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 ('3c06f2ddf55037b8cad8c81c7f9904d5', -1, 1713880989, 1713880989, '1275b796', 7, 0, 0)

Line : 187
File : sessions.php