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 ('c09da2cb4b84daecf400fef8f8c1227f', -1, 1730421157, 1730421157, '12e0433a', 14, 0, 0)

Line : 195
File : sessions.php