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 ('60156ed9bfa85b908f9e5d4747175cdd', -1, 1713549951, 1713549951, '0391bf16', -9, 0, 0)

Line : 187
File : sessions.php