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 ('c0972a0902e2ad0cbf260e93fb585721', -1, 1713587248, 1713587248, '030f039a', -4, 0, 0)

Line : 187
File : sessions.php