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 ('b0745beea41b8680ea6b728a212ca7bc', -1, 1711633956, 1711633956, '2cd432dc', -7, 0, 0)

Line : 187
File : sessions.php