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 ('b001adb0fbf99c4552f4dcbd03ff4751', -1, 1711639532, 1711639532, '2ccab776', -7, 0, 0)

Line : 187
File : sessions.php