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 ('0b8d62bf44a80a8aa4204a0c56e1a7b9', -1, 1508613512, 1508613512, '36c421f6', 15, 0, 0)

Line : 187
File : sessions.php