rocksdb.deadlock_stats cannot run with PS protocol (syntax error)

rocksdb.deadlock_stats 'write_committed' [ fail ]

        Test ended at 2022-08-18 21:32:22

CURRENT_TEST: rocksdb.deadlock_stats

mysqltest: In included file "/mnt8t/bld/10.6-debug-nightly/mysql-test/plugin/rocksdb/rocksdb/include/deadlock_stats.inc": 

included from /mnt8t/bld/10.6-debug-nightly/mysql-test/plugin/rocksdb/rocksdb/t/deadlock_stats.test at line 4:

At line 9: query '$prior_set_lwt $prior_set_dld $global_dld $global_lwt' failed: ER_PARSE_ERROR (1064): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'set @prior_deadlock_detect = @@rocksdb_deadlock_detect; set global rocksdb_de...' at line 1

The result from queries just before the failure was:

set @prior_lock_wait_timeout = @@rocksdb_lock_wait_timeout; set @prior_deadlock_detect = @@rocksdb_deadlock_detect; set global rocksdb_deadlock_detect = on; set global rocksdb_lock_wait_timeout = 100000;;