phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '12b05e6604a9cc3dd47a013fef7238d8' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('12b05e6604a9cc3dd47a013fef7238d8', -1, 1770604701, 1770604701, 'c0a8100b', -501, 0, 0)

Line : 187
File : sessions.php