phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '815ad35e860e61241eda1b9b47655405' 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 ('815ad35e860e61241eda1b9b47655405', -1, 1768165685, 1768165685, 'd849d887', 2, 0, 0)

Line : 187
File : sessions.php