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 ('65b2dd2aa795a6d54d64b9bc1788b4ec', -1, 1746207259, 1746207259, '0381fd36', 1, 0, 0)

Line : 187
File : sessions.php