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 ('3e0dffdbbd2e63e2cb35195ef78b21bb', -1, 1711632662, 1711632662, '03eec351', -4, 0, 0)

Line : 187
File : sessions.php