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 ('ea6ec1ea7d20ec9f0cbf8c97de0feb18', -1, 1508613641, 1508613641, '36c421f6', 12, 0, 0)

Line : 187
File : sessions.php