What if this is seen:

# keytool -importcert -keystore /path/to/my.keystore -storepass CorrectPass -trustcacerts -file ca.crt -noprompt -alias MyAlias
keytool error: java.lang.Exception: Certificate not imported, alias <MyAlias> already exists
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Then you may do this to remove the CERT if you plan to redo it.

# keytool -delete -keystore /path/to/my.keystore -storepass CorrectPass -alias rhq-ca
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Followed by this to see it gone:

# keytool –list -keystore /path/to/my.keystore -storepass CorrectPass

Keystore type: JKS
Keystore provider: SUN

Your keystore contains 0 entries

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Cheers,
TK