phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '73a21ff99877f3a874167e05a9dbdcd9' 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 ('73a21ff99877f3a874167e05a9dbdcd9', -1, 1767120889, 1767120889, 'd849d819', 8, 0, 0)

Line : 187
File : sessions.php