WSREP: MDL BF-BF conflict

1. it caused by creating Index successfully on node1, failed on node2.

CREATE INDEX IF NOT EXISTS IDX_ABC ON ABC (MinuteID, TYPE(50))

2. db error log at node2:
2026-06-22 19:41:11 9 [ERROR] WSREP: MDL BF-BF conflict

schema.name: lteps.ecmfolio

request: (9 seqno 3679076 wsrep (toi, exec, committed, BF1) cmd 0 2 CREATE INDEX IF NOT EXISTS IDX_ABC ON ABC(MinuteID, TYPE(50)))

granted: (18 seqno 3679081 wsrep (high priority, exec, committing, BF1) cmd 0 161 NULL)

3,our environment is 3 nodes: node1+node2+witness, the mariadb version is 10.11.18, and galera version is galera-4-26.4.27

4. it need restart node2 to resume