Question on IFERROR(INDEX(COLLECT formula

Hello! I am trying to make a spreadsheet that pulls information from another spreadsheet and displays that data (in this case a date), but i get an #unparsable error. What am i missing? I'm sure it's something minor...

=IFERROR(INDEX(COLLECT({Date Performed}, {Equipment ID}, [Equipment ID]@row, {Maintenance Type}, [Maintenance Type]@row, {Semi-Annual}, Jan) 1) "")

So what happens is employees complete a form which fills in the data for the ranges specified. I want the manager's spreadsheet to pull the date maintenance was performed if it meets the criteria on the row. So, if the Semi-Annual maintenance for SERO-33 was performed in January it would automatically document the date.

I hope i'm making sense.


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