Cant set app as device owner whitout a factory reset (i guess?)

[Geberation]

Exception occurred while executing 'set-device-owner':
java.lang.IllegalStateException: Not allowed to set the device owner because there are already some accounts on the device.
at com.android.server.devicepolicy.DevicePolicyManagerService.enforceCanSetDeviceOwnerLocked(DevicePolicyManagerService.java:11114)
at com.android.server.devicepolicy.DevicePolicyManagerService.setDeviceOwner(DevicePolicyManagerService.java:9753)
at com.android.server.devicepolicy.DevicePolicyManagerServiceShellCommand.runSetDeviceOwner(DevicePolicyManagerServiceShellCommand.java:257)
at com.android.server.devicepolicy.DevicePolicyManagerServiceShellCommand.onCommand(DevicePolicyManagerServiceShellCommand.java:87)
at com.android.modules.utils.BasicShellCommandHandler.exec(BasicShellCommandHandler.java:97)
at android.os.ShellCommand.exec(ShellCommand.java:38)
at com.android.server.devicepolicy.DevicePolicyManagerService.onShellCommand(DevicePolicyManagerService.java:11546)
at android.os.Binder.shellCommand(Binder.java:1103)
at android.os.Binder.onTransact(Binder.java:923)
at android.app.admin.IDevicePolicyManager$Stub.onTransact(IDevicePolicyManager.java:6409)
at android.os.Binder.execTransactInternal(Binder.java:1385)
at android.os.Binder.execTransact(Binder.java:1310)