1 files changed, 1 insertions, 0 deletions

diff --git a/subprojects/frontend/src/xtext/xtextServiceResults.ts b/subprojects/frontend/src/xtext/xtextServiceResults.ts
index c5bc1320..7c2fb8ec 100644
--- a/subprojects/frontend/src/xtext/xtextServiceResults.ts
+++ b/subprojects/frontend/src/xtext/xtextServiceResults.ts
@@ -156,6 +156,7 @@ export const RelationMetadata = z.object({
       opposite: z.string(),
     }),
     z.object({ type: z.literal('predicate'), error: z.boolean() }),
+    z.object({ type: z.literal('base') }),
     z.object({ type: z.literal('builtin') }),
   ]),
 });