phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a88811f0c8192ea8f1bcd4bf8d59ccc6' 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 ('a88811f0c8192ea8f1bcd4bf8d59ccc6', -1, 1762799004, 1762799004, 'd849d82e', 7, 0, 0)

Line : 187
File : sessions.php