phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4ab3c1e146b6b06410c3da31e521bdc1' 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 ('4ab3c1e146b6b06410c3da31e521bdc1', -1, 1766005883, 1766005883, 'd849d819', -9, 0, 0)

Line : 187
File : sessions.php