phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7d7d9e7ffc60e154485447cbe95bcd06' 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 ('7d7d9e7ffc60e154485447cbe95bcd06', -1, 1768207182, 1768207182, 'd849d887', -9, 0, 0)

Line : 187
File : sessions.php