1 files changed, 10 insertions, 5 deletions
diff --git a/app/assets/javascripts/diffs/utils/diff_file.js b/app/assets/javascripts/diffs/utils/diff_file.js
index 69d0e49e501..ce0398e75fc 100644
--- a/app/assets/javascripts/diffs/utils/diff_file.js
+++ b/app/assets/javascripts/diffs/utils/diff_file.js
@@ -4,11 +4,12 @@ import {
   DIFF_FILE_MANUAL_COLLAPSE,
   DIFF_FILE_AUTOMATIC_COLLAPSE,
 } from '../constants';
+import { getDerivedMergeRequestInformation } from './merge_request';
 import { uuids } from './uuids';
 
 function fileSymlinkInformation(file, fileList) {
-  const duplicates = fileList.filter(iteratedFile => iteratedFile.file_hash === file.file_hash);
-  const includesSymlink = duplicates.some(iteratedFile => {
+  const duplicates = fileList.filter((iteratedFile) => iteratedFile.file_hash === file.file_hash);
+  const includesSymlink = duplicates.some((iteratedFile) => {
     return [iteratedFile.a_mode, iteratedFile.b_mode].includes(DIFF_FILE_SYMLINK_MODE);
   });
   const brokenSymlinkScenario = duplicates.length > 1 && includesSymlink;
@@ -34,8 +35,12 @@ function collapsed(file) {
 }
 
 function identifier(file) {
+  const { userOrGroup, project, id } = getDerivedMergeRequestInformation({
+    endpoint: file.load_collapsed_diff_url,
+  });
+
   return uuids({
-    seeds: [file.file_identifier_hash, file.blob?.id],
+    seeds: [userOrGroup, project, id, file.file_identifier_hash, file.blob?.id],
   })[0];
 }
 
@@ -48,10 +53,10 @@ export function prepareRawDiffFile({ file, allFiles, meta = false }) {
     },
   };
 
-  // It's possible, but not confirmed, that `content_sha` isn't available sometimes
+  // It's possible, but not confirmed, that `blob.id` isn't available sometimes
   // See: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/49506#note_464692057
   // We don't want duplicate IDs if that's the case, so we just don't assign an ID
-  if (!meta && file.blob?.id) {
+  if (!meta && file.blob?.id && file.load_collapsed_diff_url) {
     additionalProperties.id = identifier(file);
   }