Rename the array of strings in arrays.xml

I have /arrays.xml in my values, <string-array name="pref_entries" translatable="false"> but as soon as I rename it to

<string-array name="pref_entries2" translatable="false">

I get this error:

res / values ​​/arrays.xml: 28: error: the resource in pref_entries appears in the overlay, but not in the base package; use to add.

Could you tell me how I can fix my problem?

Thank.