TLDR:
https://www.uscis.gov/policy-manual/volume-6-part-i-chapter-2 section B.2.
USCIS is under obligation to correct this CR1 error if that's what they entered into your record in their system. If the card you receive says conditional, they must correct this error to remove the condition. Note that "removal of condition" may resonate more with the USCIS staff, than the term "IR1", because IR1 is a visa terminalogy, and the visa is issued by the Department of State, whereas USCIS is under Department of Homeland Security, they may adhere more strictly to their internal lingo, vis-a-vis "conditional PR", and "removal of condition."
Section B, item 2. -- "Misclassified CPRs"
"Noncitizen spouses or children who believe they were misclassified as CPRs because the marriage took place 2 or more years before they obtained conditional permanent residence or who otherwise believe they are not subject to conditions imposed by INA 216[19] should file an Application to Replace Permanent Resident Card (Form I-90) according to the form instructions.[20]
Officers may encounter cases where the CPR was misclassified when the CPR entered the United States or adjusted status. This generally occurs due to the inspecting or adjudicating officer’s failure to notice that at least 2 years had passed since the marriage providing the basis for status occurred, at the time the noncitizen was admitted to the United States as a permanent resident or adjusted to permanent resident status...."