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 ('402887acc6b8e88c87d2497f4ab12cbb', -1, 1511342084, 1511342084, '3691753c', 10, 0, 0)

Line : 187
File : sessions.php