phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7d0a8999bb6d8161a0c3531c2cddfd5a' 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 ('7d0a8999bb6d8161a0c3531c2cddfd5a', -1, 1770027812, 1770027812, 'd849d837', -9, 0, 0)

Line : 187
File : sessions.php