phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '781df93bfcb890f8d8965bf8b0f3b8c7' 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 ('781df93bfcb890f8d8965bf8b0f3b8c7', -1, 1752065252, 1752065252, 'd849d87d', -4, 0, 0)

Line : 187
File : sessions.php