I made a repeat command block give all items the "OnGround" tag that are on the ground and a "soul1" tag if they were a certain Item. I put in the command in that summoned a creeper if they had both tags but then ALL items that were on the ground summoned creepers.
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Duplicate of MC-75269.
Selectors can only include 1 of each argument, 2 of the same type of argument, the last one is used, same with all selector arguments, this is just limitation of the used system.
The argument name (in this case tag) must be unique in the selector.