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 ('38d448551e52b50ab1b6a10cfdcb7a0c', -1, 1526878286, 1526878286, '369f55c1', 3, 0, 0)

Line : 187
File : sessions.php