phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a1f5c2980c306b498967094b953b5c35' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a1f5c2980c306b498967094b953b5c35', -1, 1763042950, 1763042950, 'c31412cc', 28, 0, 0)

Line : 187
File : sessions.php