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 ('20141de5c492eb6527b47269e0d9873d', -1, 1713505871, 1713505871, '0390fb48', -4, 0, 0)

Line : 187
File : sessions.php