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 ('a15dfd991198dca6d3ccad4560d70ba4', -1, 1713499524, 1713499524, '12776ba1', -4, 0, 0)

Line : 187
File : sessions.php