Might be referring to her Polish citizenship.
Perhaps Poland doesn’t allow dual citizenship
Poland does allow dual citizenship.
DUAL CITIZENSHIPS ALLOWED:
Australia, Barbados, Belgium, Bangladesh, Canada, Cyprus, Denmark, United States, United Kingdom, Switzerland, South Korea, South Africa (requires permission) , Egypt(requires prior permission), Greece, France, Finland, Germany (requires prior permission), Iraq, Italy, Israel, Ireland, Poland, Hungary, Iceland, Kenya, Sweden, Slovenia, Syria, Serbia, Armenia, Thailand, Lebanon, Malta, Spain ( allows only with certain Latin American countries), Tonga, Philippines, Sierra Leone, Sri Lanka (by retention), Pakistan (accepts only with 16 countries), Portugal, Turkey (requires permission)
DUAL CITIZENSHIPS NOT ALLOWED
Andorra, Austria, Azerbaijan ,Burma, Bahrain, Botswana, Japan, China ,Czech Republic, Fiji,India,Indonesia, Ecuador, Estonia, Iran, Papua New Guinea, Brunei, Japan, Peru, Kuwait, Kazakhstan, Chile, Kiribati, Korea, Kuwait, Latvia,Singapore, Slovakia, Ecuador, Lithuania, Solomon Islands ,Fiji ,Malaysia, Mauritius, Netherlands, United Arab Emirates (UAE), Romania, Mexico, Nepal, Venezuela, Norway, Zimbabwe, Mauritius, Myanmar, Nepal
PAKISTAN:
Pakistan allows dual citizenship only with the below countries
United Kingdom
Italy
France
Belgium
Iceland
Australia
New Zealand
Sweden
United States
Ireland
Netherlands
Switzerland
Canada
Egypt
Jordan
Syria
SPAIN
Allows dual citizenship with some Latin-American countries Argentina, Bolivia, Chile, Colombia, Costa Rica, the Dominican Republic, Ecuador, Guatemala, Honduras, Nicaragua, Paraguay, Peru and Uruguay, Andorra, Portugal, the Philippines and Equatorial Guinea.
http://dlgimmigration.com/united-st...ries-that-allow-or-disallow-dual-citizenship/
Now back to my waiting for my request for Definitiva to be approved and proceed on 10 year residency.