Update GRIB2_Template_4_138_ProductDefinitionTemplate_en.csv

Delete OctetCount = 12 for the "next innermost step of processing", as it is not a 12 byte  long entry.

GRIB2_Template_4_138_ProductDefinitionTemplate_en.csv

@@ -38,5 +38,5 @@ Derived reforecasts based on all ensemble members at a horizontal level or in a
 Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,66,1,Indicator of unit of time for the increment between the successive fields used,(see Code table 4.4),,4.4,,Operational
 Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,67-70,4,"Time increment between successive fields, in units defined by the previous octet",(see Notes 3 and 4),"7,97",,,Operational
 Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,,,"71-nn   These octets are included only if n > 1, where nn = 58 + 12 x n",,,,,Operational
-Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,71-82,12,"As octets 59 to 70, next innermost step of processing",,,,,Operational
+Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,71-82,,"As octets 59 to 70, next innermost step of processing",,,,,Operational
 Derived reforecasts based on all ensemble members at a horizontal level or in a horizontal layer in a continuous or non-continuous time interval,83-nn,,"Additional time range specifications, included in accordance with the value of n. Contents as octets 59 to 70, repeated as necessary",,,,,Operational