phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1114 The table 'phpbb_sessions' is full

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9be5bcddc136e9dc0845fa3aa8463c70', -1, 1467328133, 1467328133, '36a2da08', -1, 0, 0)

Line : 187
File : sessions.php