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 ('156113ec05694c6b4f0cf70e726dd2c0', -1, 1713763447, 1713763447, '2cc81bd7', -11, 0, 0)

Line : 187
File : sessions.php