i have enable developer mode and dont all the steps previously but when trying to run the adb command adb shell dpm set-device-owner com.bos.oculess/.DevAdminReceiver it pops up with the error code below

Error: Command failed: "C:\Users\andyl\AppData\Roaming\SideQuest\platform-tools\adb.exe" -s 1WMHHA618C1515 shell dpm set-device-owner com.bos.oculess/.DevAdminReceiver java.lang.IllegalStateException: Not allowed to set the device owner because there are already some accounts on the device at android.os.Parcel.createException(Parcel.java:2046) at android.os.Parcel.readException(Parcel.java:2006) at android.os.Parcel.readException(Parcel.java:1954) at android.app.admin.IDevicePolicyManager$Stub$Proxy.setDeviceOwner(IDevicePolicyManager.java:8392) at com.android.commands.dpm.Dpm.runSetDeviceOwner(Dpm.java:203) at com.android.commands.dpm.Dpm.onRun(Dpm.java:115) at com.android.internal.os.BaseCommand.run(BaseCommand.java:65) at com.android.internal.os.BaseCommand.run(BaseCommand.java:49) at com.android.commands.dpm.Dpm.main(Dpm.java:41) at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method) at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:338) Caused by: android.os.RemoteException: Remote stack trace: at com.android.server.devicepolicy.DevicePolicyManagerService.enforceCanSetDeviceOwnerLocked(DevicePolicyManagerService.java:8653) at com.android.server.devicepolicy.DevicePolicyManagerService.setDeviceOwner(DevicePolicyManagerService.java:7822) at android.app.admin.IDevicePolicyManager$Stub.onTransact(IDevicePolicyManager.java:3270) at android.os.Binder.execTransactInternal(Binder.java:1021) at android.os.Binder.execTransact(Binder.java:994)