phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'add947d9959d626e2878a426c056fcf6' 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 ('add947d9959d626e2878a426c056fcf6', -1, 1766180169, 1766180169, 'd849d819', 4, 0, 0)

Line : 187
File : sessions.php