Here is the error printed to the console after attempting to validate (I have obfuscated the value of:block/title of the block in question because it has some personal info)
[:db-invalid] {:msg "Validation errors", :errors ({:entity {:block/tx-id 537062301, :block/uuid #uuid "6929a05a-c027-4dea-b2d2-b4ca0323ef21", :block/properties [[{:db/ident :user.property/siblings-MfSJf1gL, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/many, :logseq.property/type :node} #{732 724}] [{:db/ident :user.property/historicity-yimlR2gm, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/one, :logseq.property/type :default, :property/closed-values ({:db/id 3975} {:db/id 3976} {:db/id 3977} {:db/id 3978} {:db/id 3979})} 3976] [{:db/ident :user.property/surname-SwS8KMXA, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/many, :logseq.property/type :default} #{1468 1467}] [{:db/ident :user.property/givenname-DRrwpWgU, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/many, :logseq.property/type :default} #{1466 1465}] [{:db/ident :user.property/parents-FpwphBq3, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/many, :logseq.property/type :node} #{734 307}] [{:db/ident :user.property/birthdate-LxHoYAxi, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/one, :logseq.property/type :default} 1418]], :block/updated-at 1767833136771, :block/refs #{1472 1473 1414 3974 307 724 21 1430 1431 1209 732 734}, :block/created-at 1764335706583, :user.property/born-zvJI0m8h {:db/id {:db/id {:db/id 1638025200000}}}, :block/collapsed? false, :block/tags [{:db/ident :block/tags, :db/valueType :db.type/ref, :db/cardinality :db.cardinality/many, :logseq.property/type :class} #{1209} {:page-class-id 138, :all-page-class-ids #{3 138 2 139 140}}], :block/title "[REDACTED]", :db/id 690, :block/parent 687, :block/order "a1", :block/page {:block/name "2025年11月28日", :db/id 687, :block/created-at 1764258607877, :block/tags [:logseq.class/Journal]}}, :dispatch-key :block, :errors {3216 {:user.property/born-zvJI0m8h {"normal-block" ["disallowed key"], "whiteboard-block" ["disallowed key"]}, :block/order {"whiteboard-block" ["disallowed key"]}}}})}
I have no idea where the “whiteboard-block” business comes from. I also have no idea how to manually correct these errors.