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 ('c7c0ed3e7fd66f2a361f5488ea579893', -1, 1713948866, 1713948866, '127689f3', 3, 0, 0)

Line : 187
File : sessions.php