phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9a86ec2e11fce6508f8652bff69fc765' 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 ('9a86ec2e11fce6508f8652bff69fc765', -1, 1766762964, 1766762964, 'd849d8a2', -9, 0, 0)

Line : 187
File : sessions.php