phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7f9d95fd870eb7823d8df8100be4412a' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7f9d95fd870eb7823d8df8100be4412a', -1, 1771195273, 1771195273, '7f000001', -9, 0, 0)

Line : 187
File : sessions.php