roachtest: schemachange/mixed-versions failed [createFunction: could not validate enum value removal] about cockroach HOT 7 CLOSED

create type t as enum ('a', 'b', 'c');
BEGIN;
alter type t drop  value 'c';
CREATE FUNCTION udfCall2(i int) RETURNS int LANGUAGE SQL AS $$ SELECT 1 from pg_depend where 'a'::t='a'::t $$;
COMMIT;

(mixedversion.go:592).Run: mixed-version test failure while running step 18 (run "run schemachange workload and validation in mixed version"): full command output in run_143018.312465537_n4_COCKROACHRANDOMSEED5.log: COMMAND_PROBLEM: exit status 1
test artifacts and logs in: /artifacts/schemachange/mixed-versions/run_1

  "BEGIN",
  {
   "sql": "CREATE SCHEMA schema_w1_173 AUTHORIZATION root"
  },
  "COMMIT"
 ],
 "expectedExecErrors": "",
 "expectedCommitErrors": "",
 "message": ""
}
{
 "workerId": 4,
 "clientTimestamp": "14:30:26.255471",
 "ops": [
  "BEGIN",
  {
   "sql": "ALTER TYPE schema_w4_62.enum_w0_136 DROP VALUE 'ds'"
  },
  {
   "sql": "CREATE FUNCTION schema_w2_3.udf_w4_165(enum_0 schema_w4_9.enum_w0_51, enum_1 schema_w4_9._enum_w0_51, enum_2 schema_w4_62.enum_w0_136)\n\tRETURNS VOID\n\tLANGUAGE SQL\n\tAS $$ SELECT NULL WHERE ('da'::schema_w4_9.enum_w0_51 IS NULL) AND ('dsfas'::schema_w4_62.enum_w0_136 IS NULL) $$"
  },
  "COMMIT"
 ],
 "expectedExecErrors": "",
 "expectedCommitErrors": "",
 "message": "***UNEXPECTED COMMIT ERROR; Received an unexpected commit error: ERROR: transaction committed but schema change aborted with error: (42P01): could not validate enum value removal for \"ds\": relation \"[426]\" does not exist (SQLSTATE 42P01)"

create type t as enum ('a', 'b', 'c');
CREATE FUNCTION udfCall2(i int) RETURNS int LANGUAGE SQL AS $$ SELECT 1 from pg_depend where 'a'::t='a'::t $$;
alter type t drop  value 'c';