Crone, J.
The State of Indiana appeals the trial court’s grant of John J. Arnold’s motion to set aside his habitual offender enhancement. The State contends that the trial court erred in refusing to vacate Arnold’s entire plea agreement when it vacated his habitual offender enhancement. We conclude that Arnold’s motion to set aside habitual offender enhancement should be treated as a petition for postconviction relief and that the trial court’s judgment should be reviewed as an award of postconviction relief. We also conclude that the vacatur of Arnold’s habitual offender enhancement would frustrate the basic purpose of the plea agreement, and therefore the trial court erred in not setting the entire agreement aside. Accordingly, we affirm in part, reverse in part, and remand.
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At the guilty plea hearing in September 2013, Arnold acknowledged that he had three prior felony convictions, two of which were prior unrelated felony convictions as required under Indiana Code Section 35-50-2-8 to support his habitual offender status. One of the felonies was a 2007 class C felony conviction for intimidation in Clark County. The trial court accepted the plea agreement and entered a judgment sentencing Arnold according to its terms.
In the meantime, however, Arnold had filed a petition for postconviction relief in Clark County for his 2007 intimidation conviction. His petition was granted and that conviction was vacated. In December 2013, Arnold filed in this case a motion to set aside habitual offender enhancement because his 2007 Clark County conviction had been vacated. The trial court held a hearing on the motion.
The trial court granted Arnold’s motion to set aside the habitual offender enhancement and set another hearing for the parties to present further argument on whether the rest of the plea agreement should be set aside. Following the hearing, the trial court reaffirmed its order setting aside only the habitual offender enhancement. The State appeals.
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In fact, another panel of this Court specifically considered the appropriate method by which to challenge a habitual offender enhancement when an underlying conviction has been set aside and concluded that a postconviction proceeding is the proper route. Poore v. State, 613 N.E.2d 478, 480 (Ind. Ct. App. 1993). In so holding, the Poore court clarified that Indiana Code Section 35-38-1-15 should be limited to those instances where the sentence is facially defective; that is, when a sentence “violates express statutory authority at the time the sentence is pronounced.” Id. Furthermore, we observe that claims of error regarding guilty pleas are governed by the postconviction rules. Indiana Code Section 35-35-1-4(c) provides that a motion to vacate judgment and withdraw guilty plea to correct manifest injustice “shall be treated by the court as a petition for postconviction relief under the Indiana Rules of procedure for Postconviction Remedies.”
Arnold contends that he followed the same procedure used by the defendants in Coble v. State, 500 N.E.2d 1221 (Ind. 1986), and Olinger v. State, 494 N.E.2d 310 (Ind. 1986). In both cases, a jury found the defendant guilty of a felony and of being a habitual offender. In both cases, one of the underlying convictions for the habitual offender finding was vacated and each defendant filed a motion to have the habitual offender enhancement set aside. Each defendant successfully obtained the vacatur of his habitual offender enhancement while the felony to which it attached remained unaffected. Olinger, 494 N.E.2d at 311; Coble, 500 N.E.2d at 1222-23. The issues raised on appeal in those cases are completely unrelated to the one here, but Arnold argues that because he, like Olinger and Coble, filed a motion to set aside habitual offender enhancement rather than a petition for postconviction relief, he is entitled to seek vacatur only of his habitual offender enhancement and leave the remainder of his plea agreement intact.
In light of Robinson and Poore, we conclude that Olinger and Coble are outdated with respect to procedure and that Arnold’s reliance on them for the appropriate procedure is misplaced. We conclude that Arnold’s attempt to have his habitual offender enhancement set aside was improperly brought by a motion and should have been brought by a petition for postconviction relief. Furthermore, Arnold’s argument that he is entitled to seek vacatur only of his habitual offender enhancement because he filed a motion rather than seeking postconviction relief is unavailing because it is based entirely on Olinger and Coble.
We acknowledge that Sections 2 and 3 of Indiana Postconviction Rule 1 contain requirements for filing and content that Arnold did not follow. However, Arnold’s motion was heard and ruled on, and therefore in the interests of judicial economy we will treat Arnold’s motion to set aside habitual offender enhancement as a request for postconviction relief and review the trial court’s judgment accordingly.
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We are persuaded by the State’s argument. The State dismissed a class A felony attempted murder charge in exchange for Arnold’s agreement to serve a twenty-year sentence. The class A felony exposed Arnold to a thirty-year advisory sentence and a fifty-year maximum sentence. Ind. Code § 35-50-2-4. In vacating the habitual offender enhancement, the trial court changed the sentence the parties had bargained for from twenty years to eight. [Footnote omitted.] We cannot say that the State would have entered the agreement without the habitual offender enhancement. We conclude that the habitual offender enhancement cannot be eliminated without frustrating the basic purpose of the contract. Therefore, we conclude that the State has presented a prima facie case that the trial court erred in failing to set aside Arnold’s plea agreement when it vacated the habitual offender enhancement.
Friedlander, J., and Kirsch, J., concur.