Even though criminal history may go back several years, the Guidelines in effect when the current offense was committed must be used to determine the eligibility of and to assign the point or unit values for previous offenses. The only exception to this is when the offense severity level is determined by a monetary threshold. The weight assigned to the prior will be based on the severity level assigned when the monetary threshold was in effect.
The offense level (felony, misdemeanor etc.) is determined in part by the sentence imposed. See Minn. Stat. § 609.13. The definitions of offense levels is found in Minn. Stat. § 609.02 subd. 2-4a.