diff --git a/packages/frontend/editor-ui/src/features/ai/instanceAi/workflowSetup/components/WorkflowSetupSectionBody.vue b/packages/frontend/editor-ui/src/features/ai/instanceAi/workflowSetup/components/WorkflowSetupSectionBody.vue
index 974c2b33a4a..89b37626673 100644
--- a/packages/frontend/editor-ui/src/features/ai/instanceAi/workflowSetup/components/WorkflowSetupSectionBody.vue
+++ b/packages/frontend/editor-ui/src/features/ai/instanceAi/workflowSetup/components/WorkflowSetupSectionBody.vue
@@ -21,6 +21,7 @@ import type { INodeUi, INodeUpdatePropertiesInformation, IUpdateInformation } fr
 import type { WorkflowSetupSection } from '../workflowSetup.types';
 import { useWorkflowSetupContext } from '../composables/useWorkflowSetupContext';
 import { AI_GATEWAY_MANAGED_TAG } from '../../constants';
+import { findPlaceholderDetails } from '@n8n/utils/placeholder';
 
 const props = defineProps<{
 	section: WorkflowSetupSection;
@@ -75,6 +76,25 @@ const parameterDefinitions = computed<INodeProperties[]>(() => {
 	return nodeType.value.properties.filter((property) => names.has(property.name));
 });
 
+const assignmentCollectionEditableValueIndices = computed<Record<string, number[]>>(() => {
+	const result: Record<string, number[]> = {};
+	for (const parameter of parameterDefinitions.value) {
+		if (parameter.type !== 'assignmentCollection') continue;
+
+		const indices = new Set<number>();
+		const placeholderDetails = findPlaceholderDetails(
+			props.section.node.parameters[parameter.name],
+		);
+		for (const detail of placeholderDetails) {
+			if (detail.path[0] !== 'assignments' || detail.path[2] !== 'value') continue;
+			const match = /^\[(\d+)\]$/.exec(detail.path[1] ?? '');
+			if (match?.[1]) indices.add(Number.parseInt(match[1], 10));
+		}
+		result[parameter.name] = [...indices];
+	}
+	return result;
+});
+
 const revealedIssues = ref(new Set<string>());
 
 watch(
@@ -212,6 +232,7 @@ function onParameterValueChanged(update: IUpdateInformation) {
 				:remove-first-parameter-margin="true"
 				:remove-last-parameter-margin="true"
 				:options-overrides="{ hideExpressionSelector: true, hideFocusPanelButton: true }"
+				:assignment-collection-editable-value-indices="assignmentCollectionEditableValueIndices"
 				@value-changed="onParameterValueChanged"
 				@parameter-blur="revealParameterIssues"
 			/>
diff --git a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/Assignment.vue b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/Assignment.vue
index d55ce8f302a..7772a08373e 100644
--- a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/Assignment.vue
+++ b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/Assignment.vue
@@ -18,6 +18,7 @@ import { propertyNameFromExpression } from '@/app/utils/mappingUtils';
 import { N8nIconButton, N8nTooltip } from '@n8n/design-system';
 import { typeFromExpression } from '../../utils/assignmentCollection.utils';
 import { injectWorkflowDocumentStore } from '@/app/stores/workflowDocument.store';
+import type { ParameterOptionsOverrides } from '@/features/ndv/shared/ndv.utils';
 
 interface Props {
 	path: string;
@@ -27,6 +28,8 @@ interface Props {
 	disableType?: boolean;
 	isReadOnly?: boolean;
 	index?: number;
+	valueOnly?: boolean;
+	optionsOverrides?: ParameterOptionsOverrides;
 }
 
 const props = defineProps<Props>();
@@ -91,7 +94,7 @@ const valueParameter = computed<INodeProperties>(() => {
 			: 'value';
 	return {
 		name: 'value',
-		displayName: 'Value',
+		displayName: props.valueOnly && assignment.value.name ? assignment.value.name : 'Value',
 		default: '',
 		placeholder,
 		...assignmentTypeToNodeProperty(assignment.value.type ?? 'string'),
@@ -165,14 +168,14 @@ const onValueDrop = async (droppedExpression: string) => {
 	>
 		<N8nIconButton
 			variant="ghost"
-			v-if="!isReadOnly"
+			v-if="!isReadOnly && !valueOnly"
 			size="small"
 			icon="grip-vertical"
 			:class="[$style.iconButton, $style.defaultTopPadding, 'drag-handle']"
 		/>
 		<N8nIconButton
 			variant="ghost"
-			v-if="!isReadOnly"
+			v-if="!isReadOnly && !valueOnly"
 			size="small"
 			icon="trash-2"
 			data-test-id="assignment-remove"
@@ -181,7 +184,32 @@ const onValueDrop = async (droppedExpression: string) => {
 		/>
 
 		<div :class="$style.inputs">
-			<InputTriple middle-width="100px">
+			<div v-if="valueOnly" :class="$style.value">
+				<ParameterInputFull
+					display-options
+					hide-issues
+					hide-hint
+					is-assignment
+					:is-read-only="isReadOnly"
+					:options-overrides="optionsOverrides"
+					:parameter="valueParameter"
+					:value="assignment.value"
+					:path="`${path}.value`"
+					data-test-id="assignment-value"
+					@update="onAssignmentValueChange"
+					@blur="onBlur"
+					@drop="onValueDrop"
+				/>
+				<ParameterInputHint
+					v-if="resolvedExpressionString"
+					data-test-id="parameter-expression-preview-value"
+					:class="[$style.hint]"
+					:highlight="highlightHint"
+					:hint="hint"
+					single-line
+				/>
+			</div>
+			<InputTriple v-else middle-width="100px">
 				<template #left>
 					<ParameterInputFull
 						display-options
diff --git a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.test.ts b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.test.ts
index 11395ff9a8e..bfb46d9903d 100644
--- a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.test.ts
+++ b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.test.ts
@@ -133,6 +133,42 @@ describe('AssignmentCollection.vue', () => {
 		expect(getInput(within(assignments[1]).getByTestId('assignment-value'))).toHaveValue('value2');
 	});
 
+	it('keeps source assignments unchanged while editing restricted values', async () => {
+		const sourceValue: AssignmentCollectionValue = {
+			assignments: [
+				{
+					name: 'teamId',
+					value: '<__PLACEHOLDER_VALUE__Linear team ID__>',
+					type: 'string',
+				} as AssignmentValue,
+			],
+		};
+
+		const { findByTestId, queryByTestId } = renderComponent({
+			props: {
+				value: sourceValue,
+				editableValueIndices: [0],
+			},
+		});
+
+		const assignment = await findByTestId('assignment');
+		const valueInput = getInput(within(assignment).getByTestId('assignment-value'));
+		await userEvent.type(valueInput, 'team-1');
+		await fireEvent.blur(valueInput);
+
+		expect(sourceValue).toEqual({
+			assignments: [
+				{
+					name: 'teamId',
+					value: '<__PLACEHOLDER_VALUE__Linear team ID__>',
+					type: 'string',
+				},
+			],
+		});
+		expect(within(assignment).queryByTestId('assignment-remove')).not.toBeInTheDocument();
+		expect(queryByTestId('assignment-collection-drop-area')).not.toBeInTheDocument();
+	});
+
 	it('renders empty state properly', async () => {
 		const { getByTestId, queryByTestId } = renderComponent();
 		expect(getByTestId('assignment-collection-fields')).toBeInTheDocument();
diff --git a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.vue b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.vue
index 7bacca71acf..e1267224ddb 100644
--- a/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.vue
+++ b/packages/frontend/editor-ui/src/features/ndv/parameters/components/AssignmentCollection/AssignmentCollection.vue
@@ -20,6 +20,7 @@ import Draggable from 'vuedraggable';
 import ExperimentalEmbeddedNdvMapper from '@/features/workflows/canvas/experimental/components/ExperimentalEmbeddedNdvMapper.vue';
 import { ExpressionLocalResolveContextSymbol } from '@/app/constants';
 import { useExperimentalNdvStore } from '@/features/workflows/canvas/experimental/experimentalNdv.store';
+import type { ParameterOptionsOverrides } from '@/features/ndv/shared/ndv.utils';
 
 import { N8nInputLabel } from '@n8n/design-system';
 import { injectWorkflowDocumentStore } from '@/app/stores/workflowDocument.store';
@@ -31,6 +32,8 @@ interface Props {
 	disableType?: boolean;
 	node: INode | null;
 	isReadOnly?: boolean;
+	editableValueIndices?: number[];
+	optionsOverrides?: ParameterOptionsOverrides;
 }
 
 const props = withDefaults(defineProps<Props>(), {
@@ -50,10 +53,10 @@ const dropAreaContainer = useTemplateRef('dropArea');
 function createParamValue(value: AssignmentCollectionValue): AssignmentCollectionValue {
 	return {
 		assignments:
-			value.assignments?.map((assignment) => {
-				if (!assignment.id) assignment.id = crypto.randomUUID();
-				return assignment;
-			}) ?? [],
+			value.assignments?.map((assignment) => ({
+				...assignment,
+				id: assignment.id ?? crypto.randomUUID(),
+			})) ?? [],
 	};
 }
 
@@ -72,6 +75,18 @@ const issues = computed(() => {
 });
 
 const empty = computed(() => state.paramValue.assignments.length === 0);
+const hasRestrictedAssignments = computed(() => props.editableValueIndices !== undefined);
+const visibleAssignments = computed(() => {
+	const editableIndices = props.editableValueIndices;
+	if (editableIndices === undefined) {
+		return state.paramValue.assignments.map((assignment, index) => ({ assignment, index }));
+	}
+
+	return editableIndices.flatMap((index) => {
+		const assignment = state.paramValue.assignments[index];
+		return assignment ? [{ assignment, index }] : [];
+	});
+});
 const activeDragField = computed(() => propertyNameFromExpression(ndvStore.value.draggableData));
 const inputData = computed(() => ndvStore.value.ndvInputData?.[0]?.json);
 const actions = computed(() => {
@@ -166,7 +181,7 @@ function optionSelected(action: string) {
 			underline
 			color="text-dark"
 		>
-			<template #options>
+			<template v-if="!hasRestrictedAssignments" #options>
 				<ParameterOptions
 					:parameter="parameter"
 					:value="value"
@@ -180,6 +195,7 @@ function optionSelected(action: string) {
 
 		<ExperimentalEmbeddedNdvMapper
 			v-if="
+				!hasRestrictedAssignments &&
 				experimentalNdvStore.isNdvInFocusPanelEnabled &&
 				dropAreaContainer?.$el &&
 				node &&
@@ -194,6 +210,7 @@ function optionSelected(action: string) {
 		<div :class="$style.content">
 			<div :class="$style.assignments">
 				<Draggable
+					v-if="!hasRestrictedAssignments"
 					v-model="state.paramValue.assignments"
 					item-key="id"
 					handle=".drag-handle"
@@ -215,9 +232,23 @@ function optionSelected(action: string) {
 						</Assignment>
 					</template>
 				</Draggable>
+				<Assignment
+					v-for="{ assignment, index } in visibleAssignments"
+					v-else
+					:key="assignment.id ?? index"
+					:model-value="assignment"
+					:index="index"
+					:path="`${path}.assignments.${index}`"
+					:issues="getIssues(index)"
+					:is-read-only="isReadOnly"
+					disable-type
+					:options-overrides="optionsOverrides"
+					value-only
+					@update:model-value="(value) => onAssignmentUpdate(index, value)"
+				/>
 			</div>
 			<div
-				v-if="!isReadOnly"
+				v-if="!isReadOnly && !hasRestrictedAssignments"
 				:class="$style.dropAreaWrapper"
 				data-test-id="assignment-collection-drop-area"
 				@click="addAssignment"
diff --git a/packages/frontend/editor-ui/src/features/ndv/parameters/components/ParameterInputList.vue b/packages/frontend/editor-ui/src/features/ndv/parameters/components/ParameterInputList.vue
index e90229c10ed..0b68fc6babc 100644
--- a/packages/frontend/editor-ui/src/features/ndv/parameters/components/ParameterInputList.vue
+++ b/packages/frontend/editor-ui/src/features/ndv/parameters/components/ParameterInputList.vue
@@ -86,6 +86,7 @@ type Props = {
 	removeLastParameterMargin?: boolean;
 	newlyAddedParameters?: Set<string>;
 	optionsOverrides?: ParameterOptionsOverrides;
+	assignmentCollectionEditableValueIndices?: Record<string, number[]>;
 	layout?: 'inline';
 };
 
@@ -922,6 +923,8 @@ watch(
 				:is-read-only="isReadOnly"
 				:default-type="item.parameter.typeOptions?.assignment?.defaultType"
 				:disable-type="item.parameter.typeOptions?.assignment?.disableType"
+				:options-overrides="optionsOverrides"
+				:editable-value-indices="assignmentCollectionEditableValueIndices?.[item.parameter.name]"
 				@value-changed="valueChanged"
 			/>
 			<div v-else-if="credentialsParameterIndex !== index" class="parameter-item">