Hi, you don't have to worry. According to BMI information, you got registered in the "Ausländerzentralregister (AZR)", the statistical register for foreigners in Germany and the secured information can be traced by this ID number:
https://***.bmi.bund.de/DE/service/lexikon/functions/bmi-lexikon.html?cms_lv3=9397772&cms_lv2=9391092