phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('66d0ae50be867de0526ae9d22b992302', -1, 1714003123, 1714003123, '12de4598', -9, 0, 0)

Line : 187
File : sessions.php