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 ('ead0eeec7a83b4dd9a0fd863a9765793', -1, 1713550819, 1713550819, '038a2157', -4, 0, 0)

Line : 187
File : sessions.php