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 ('07fa66251f9a918d4f51d6c52d2b9003', -1, 1714378664, 1714378664, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php