Gracefully handle double removal of version 0 attributes index.

Author: dlongley

CHANGELOG.md

@@ -1,5 +1,12 @@
 # bedrock-edv-storage ChangeLog
 
+## 20.1.1 - 2025-04-dd
+
+### Fixed
+- Gracefully handle case where `documentCompatibilityVersion` is set to `1`
+  and concurrent processes try to remove the old version `0` index (this
+  should not cause the application to restart once).
+
 ## 20.1.0 - 2025-04-22
 
 ### Added

lib/storage/docs.js

@@ -530,7 +530,15 @@ export async function _handleDocumentCompatibility({
     // then version `0` documents may be concurrently inserted and fail to be
     // properly indexed w/o running migration again -- this can lead to
     // corruption and should never be allowed to happen
-    await collection.dropIndex('attributes');
+    try {
+      await collection.dropIndex('attributes');
+    } catch(error) {
+      if(error.codeName !== 'IndexNotFound') {
+        logger.error(
+          'Failed to drop EDV doc version 0 index; perhaps already dropped; ' +
+          'will check again later.', {error});
+      }
+    }
     return;
   }