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 ('c59bc61b17debd8e7c4b048b6b687f4d', -1, 1643286003, 1643286003, '36a16260', 0, 0, 0)

Line : 187
File : sessions.php