diff --git a/client/src/schema/schema.ts b/client/src/schema/schema.ts
index 8f1f59a6641..3dd1c145d7f 100644
--- a/client/src/schema/schema.ts
+++ b/client/src/schema/schema.ts
@@ -4564,7 +4564,7 @@ export interface components {
              * Changeset revision number
              * @description The linearized 0-based index of the changeset on the tool shed (0, 1, 2,...)
              */
-            ctx_rev: string;
+            ctx_rev?: string;
             /** Deleted */
             deleted: boolean;
             /** Dist To Shed */
diff --git a/lib/galaxy/schema/schema.py b/lib/galaxy/schema/schema.py
index 92ee2a5125e..2d5ca780257 100644
--- a/lib/galaxy/schema/schema.py
+++ b/lib/galaxy/schema/schema.py
@@ -2329,7 +2329,7 @@ class InstalledToolShedRepository(Model):
     owner: str = Field(title="Owner", description="Owner of repository")
     deleted: bool
     # This should be an int... but it would break backward compatiblity. Probably switch it at some point anyway?
-    ctx_rev: str = Field(
+    ctx_rev: Optional[str] = Field(
         title="Changeset revision number",
         description="The linearized 0-based index of the changeset on the tool shed (0, 1, 2,...)",
     )