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 ('44c843a570be57a10322a59d8e1bf2b9', -1, 1526969720, 1526969720, '369edbf8', 14, 0, 0)

Line : 187
File : sessions.php