diff --git a/deps/db/src/logseq/db/frontend/validate.cljs b/deps/db/src/logseq/db/frontend/validate.cljs
index df71d5f96..52baec2a6 100644
--- a/deps/db/src/logseq/db/frontend/validate.cljs
+++ b/deps/db/src/logseq/db/frontend/validate.cljs
@@ -16,6 +16,9 @@
     closed-schema?
     mu/closed-schema))
 
+;; FIXME: flexible schema
+;; e.g. ent-map example:
+;; {:block/tx-id 536872023}
 (defn validate-tx-report!
   "Validates the datascript tx-report for entities that have changed. Returns
   boolean indicating if db is valid"
@@ -74,4 +77,4 @@
     (cond-> {:datom-count (count datoms)
              :entities ent-maps}
       (some? errors)
-      (assoc :errors (group-errors-by-entity db ent-maps errors)))))
\ No newline at end of file
+      (assoc :errors (group-errors-by-entity db ent-maps errors)))))