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 ('2a793fa4b281b1b702771f07af9e4510', -1, 1730415393, 1730415393, '0311b827', -2, 0, 0)

Line : 195
File : sessions.php