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 ('6844cdd3d9fd8c58b850e5f9ecc6fa34', -1, 1711668927, 1711668927, '36522c95', 3, 0, 0)

Line : 187
File : sessions.php