Oracle Message NNO-00056 - warning: domain minimum TTL must be between number and number, set to number seconds

ERRORwarning: domain minimum TTL must be between number and number, set to number seconds
CAUSEThe servers configuration contains a domain description with an invalid minimum TTL. This error is not fatal; the server will automatically set the TTL to a default value which is suitable for most uses.
ACTIONAn internal error not normally visible to the user. Contact Worldwide Customer Support.