I can't package my project with android

Hi Everybody is good,
I have a PC game project,I can package my project with Windows but when I package android it failed.
Log:AutomationTool terminated with exception: ERROR: DistributionSigning settings are not all set. Check the DistributionSettings section in the Andriod tab of Project Settings.
But Idon’t check ForDistribution. I only want to test the package android.
Can someone help me?I’m going to post my LOG.alt text

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