phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('98ae524b3fb1a8be6909ec1b3d1f2bee', -1, 1713443352, 1713443352, '12df2b8e', -4, 0, '0', '0')

Line : 175
File : sessions.php