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 ('8ede1828fb6ef7513c3b25e4007a8e8b', -1, 1714193504, 1714193504, '12d90852', -4, 0, 0)

Line : 187
File : sessions.php