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 ('d4592f5ea7c77ec1ee2103a8c3f8c84d', -1, 1542231546, 1542231546, '36a712aa', 18, 0, 0)

Line : 187
File : sessions.php