Get this error for any change made to the template, even just opening it and trying to save it in Admin console. Get no errors in Web Admin Console. But I can not understand this error one bit.

Error Code: 9002
Error Message: Object already exists. [9002]

------------ Technical Details ------------

LFSO:
    Call Stack: (Exception)
        LFSession::ProcessResponse
        LFSession::SendRequest (PUT /+LF/prop?id=52)
        CLFTemplateField::SendPropertiesToServer
        ILFObjectImpl::Update
    Additional Details:
        HRESULT: 0xc004232a (LFSession::ProcessResponse, LFSession.cpp:3901)
         (LFSO/12.0.2503.195)
LFAdmin.dll (12.0.2503.195):
    Call Stack: (Current)
        CTemplate1PropPage::OnApply
    Call History:
        CLocalizedObjectsPropPage::OnInitDialog
         CLocalizedObjectsPropPage::InitializeList
        CTemplate1PropPage::OnApply
         CDynamicFieldPropPage::OnQuerySiblings
         CFieldGroupPropPage::OnQuerySiblings
         CLocalizedObjectsPropPage::OnQuerySiblings
         CTemplate1PropPage::TemplateOK
         CTemplate1PropPage::ReadFields