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Accessing hidden method Ldalvik/system/CloseGuard;->close()V (greylist,core-platform-api, linking, allowed)

I wanted to publish some updates I wrote using flutter and Firebase, which I shared in the store and are used by many users, I wanted to make some updates yesterday, there were no problems. I am now getting this error in the debug console:

debug console :

Launching lib\main.dart on Android SDK built for x86 in debug mode...
√  Built build\app\outputs\flutter-apk\app-debug.apk.
D/EGL_emulation(14746): eglMakeCurrent: 0xebb92b00: ver 2 0 (tinfo 0xc8f08720)
W/om.project.IKP(14746): Accessing hidden method Lsun/misc/Unsafe;->putInt(Ljava/lang/Object;JI)V (greylist, linking, allowed)
W/om.project.IKP(14746): Accessing hidden method Lsun/misc/Unsafe;->getObject(Ljava/lang/Object;J)Ljava/lang/Object; (greylist, linking, allowed)
W/om.project.IKP(14746): Accessing hidden method Lsun/misc/Unsafe;->getObject(Ljava/lang/Object;J)Ljava/lang/Object; (greylist, linking, allowed)
W/om.project.IKP(14746): Accessing hidden method Lsun/misc/Unsafe;->putInt(Ljava/lang/Object;JI)V (greylist, linking, allowed)
W/om.project.IKP(14746): Accessing hidden method Lsun/misc/Unsafe;->putObject(Ljava/lang/Object;JLjava/lang/Object;)V (greylist, linking, allowed)
W/om.project.IKP(14746): Accessing hidden method Ldalvik/system/CloseGuard;->close()V (greylist,core-platform-api, linking, allowed)
Why am I getting this problem, thinking that it may be from the last changes I made in the code where the data was not deleted in Firebase. I used the code of a working version again, but I continued to get the same error, now users can download the application from the store and register, but I get this error in the admin panel.
// OKEY I solved the problem, main cause was when I updated the code, I changed some values and those changes created some issues. I deleted the changes from Firebase DB and the problem is solved.
        
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