When defining a Layer 4 application signature, what are the valid options for flows already...

Always – remove the layer 7 tag and apply the layer 4 tag instead.

Unclassified – remove the layer 7 tag and apply the layer 4 tag only if the flow is already tagged unclassified.

Unknown – remove the layer 7 tag and apply the layer 4 tag only if the flow is already tagged unknown.

Unknown/Unclassified – remove the layer 7 tag and apply the layer 4 tag only if flow is tagged as both unknown and unclassified.

Unknown/Unclassified – remove the layer 7 tag and apply the layer 4 tag only if flow is tagged as unknown or unclassified.