Any method to detect the METADATA conflicts?

[ray-linn]

I add two metadata with a conflict key under the same property

		registration::property("value", &g_value)(
			metadata(ASN1_ATTRIBUTE_TAG, ASN1IntegerAttr {.name = "Data" }),
			metadata(ASN1_ATTRIBUTE_TAG, ASN1BooleanAttr {.name = "Flag"})

			);

When running unit test, it looks only 1st metadata is reserved, however, I hope this conflict can be reported at runtime? is there any method to force it throws exceptions instead of ignore the conflict?