phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2c07655da9e892dd0c329578fd18f640' for key 'phpbb2_sessions.PRIMARY'

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2c07655da9e892dd0c329578fd18f640', -1, 1783319992, 1783319992, 'd849d8fb', 0, 0, 0)

Line : 187
File : sessions.php