How can I have 2 similar apps?

Hello, I created an app and worked a lot on it. Later I wanted to create a similar one but with some tiny differences, so I copied all the folders on a different directory. Now when I try to “ionic run android” my old app disappears and the new one takes his place. Where do I change its ID or something like that so I have both apps at the same time?

Change the widget id in config.xml

for example

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Thanks I changed it and it worked!