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 ('bbbf5230b8b1331f37d8932866dcb73c', -1, 1711723068, 1711723068, '2cc8f0cd', 2, 0, 0)

Line : 187
File : sessions.php