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 ('4603f7546af9f0db36328e6c4c3944a0', -1, 1713563947, 1713563947, '038e7cfc', -4, 0, 0)

Line : 187
File : sessions.php