phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'fda6c734891fdbc49e2979a4c2b24a48' 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 ('fda6c734891fdbc49e2979a4c2b24a48', -1, 1770138864, 1770138864, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php