Multiple customizations adding the same filed

I have a scenario where I have multiple customizations adding different custom fields. In any time unknown number or combination of customizations can be published. Issue is I need to add a common field to a screen that should be available regardless what customizations are published.

<AddItem>
   <PXCheckBox TypeFullName="PX.Web.UI.PXCheckBox">
      <Prop Key="Virtual:ApplyStylesheetSkin" />
      <Prop Key="ID" Value="CstPXCheckBox1" />
      <Prop Key="DataField" Value="Usrtest" />
      <Prop Key="CommitChanges" Value="True" />
   </PXCheckBox>
</AddItem>

<DAC type="PX.Objects.CR.BAccount">
   <Field FieldName="Usrtest" TypeName="bool" MapDbTable="BAccount" TextAttributes="#CDATA" 
         StorageName="AddColumn">
            <CDATA name="TextAttributes"><![CDATA[[PXDBBool]
               [PXUIField(DisplayName="test")]
            ]]></CDATA>
   </Field>
</DAC>

// and db record

I have set levels for each of my customizations, but when publishing it gives below error.

\App_RuntimeCode\PX_Objects_CR_BAccount_extensions.cs(29): error CS0579: Duplicate 'PXDBBool' attribute

\App_RuntimeCode\PX_Objects_CR_BAccount_extensions.cs(30): error CS0579: Duplicate 'PXUIField' attribute

\App_RuntimeCode\PX_Objects_CR_BAccount_extensions.cs(29): error CS0579: Duplicate 'PXDBBool' attribute

I am quite new to Acumatica, so any possibility I am missing something here, or is there a way we can merge these projects resulting the common field.

Thanks in Advance!!