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 ('6547dc16b174dfcf5e2a18e542652c3a', -1, 1713299066, 1713299066, '12e25dd1', 5, 0, 0)

Line : 187
File : sessions.php