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 ('71d2600ab96e03d63f377be809284c6a', -1, 1713560731, 1713560731, '12761efd', -2, 0, 0)

Line : 187
File : sessions.php