Software error:

DBD::mysql::db selectcol_arrayref failed: Table 'groups' was not locked with
LOCK TABLES [for Statement "SELECT DISTINCT groups.name, group_id
                                              FROM groups, user_group_map
                                             WHERE groups.id=user_group_map.group_id
                                               AND user_id=?
                                               AND isbless=0"] at
Bugzilla/User.pm line 227
	Bugzilla::User::groups('Bugzilla::User=HASH(0x86209f0)') called at
Bugzilla/User.pm line 277
	Bugzilla::User::can_see_bug('Bugzilla::User=HASH(0x86209f0)',5374) called at
votes.cgi line 188
	main::show_user() called at votes.cgi line 76

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error message and the time and date of the error.