System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, AcuteFacilityTrigger: execution of AfterInsert

caused by: System.DmlException: Update failed. First exception on row 0 with id a3vD70000011WczIAE; first error: INVALID_OR_NULL_FOR_RESTRICTED_PICKLIST, Palmer Group: bad value for restricted picklist field: Test Group: [Palmer_Group__c]

Class.AcuteFacilityHandler.updateAgreement: line 22, column 1
Trigger.AcuteFacilityTrigger: line 3, column 1: []

Testcalss:-
@isTest
public class AcuteFacilityTriggerTest {

    public static testmethod void AcuteFacilityTest() {
        Id agrRecordType = Schema.SObjectType.Apttus__APTS_Agreement__c.getRecordTypeInfosByName().get('Medical Director Agreement (MDA)').getRecordTypeID();
        ID ACC_RT = Schema.SObjectType.Account.getRecordTypeInfosByName().get('Dialysis Centers').getRecordTypeID();

        Test.startTest();

        Legal_Entity__c le = new Legal_Entity__c();
        le.State__c = 'Alaska';
        le.Name = 'Test Legal Entity';
        insert le;

        Account ac = new Account();
        ac.Name = 'test Account';
        ac.RecordTypeId = ACC_RT;
        ac.Type = 'Denovo';
        ac.BillingPostalCode = '41011';
        ac.BillingCity = 'covington';
        ac.BillingState = 'KY';
        ac.BillingCountry = 'USA';
        ac.BillingStreet = '1500 JAMES SIMPSON JR WAY, STE 1100';
        //Changed as Group__c to Palmer_Group__c 12/06/2023
        //ac.Group__c = 'Apex';
        ac.DVA_Facility_Number__c = 555;
        ac.Legal_Entity2__c = le.Id;
        ac.MDM_Group__c = 'Test Group';
        ac.MDM_Division_Mapped__c = 'Test Division';
        insert ac;

        Apttus__APTS_Agreement__c agg = new Apttus__APTS_Agreement__c();
        agg.RecordTypeId = agrRecordType;
        insert agg;

        Acute_Facility__c acc = new Acute_Facility__c();
        acc.Agreement__c = agg.Id;
        acc.Facility_Name__c = ac.Id;
        insert acc;

        Apttus__APTS_Agreement__c agr = [Select Davita_Legal_Entity_2__c, Division__c, Palmer_Group__c, Facility_Name_for_Template__c, Facility_Number_for_Template__c from Apttus__APTS_Agreement__c where Id =: agg.Id];
        Acute_Facility__c af = [Select MDA_Fac_Davita_legal_Entity__c, Facility_Division__c, Facility_Group__c, Facility_Number__c, Facility_Name_Acute__c from Acute_Facility__c where Id =: acc.Id];
        System.assertEquals(agr.Davita_Legal_Entity_2__c, af.MDA_Fac_Davita_legal_Entity__c);
        System.assertEquals(agr.Division__c, af.Facility_Division__c);
        System.assertEquals(agr.Palmer_Group__c, af.Facility_Group__c);
        System.assertEquals(agr.Facility_Name_for_Template__c, af.Facility_Name_Acute__c);
        System.assertEquals(agr.Facility_Number_for_Template__c, af.Facility_Number__c);

        Test.stopTest();
    }


}

Class:-

trigger AcuteFacilityTrigger on Acute_Facility__c(after insert, after update) {

    AcuteFacilityHandler.updateAgreement(trigger.New);
}