The accompanying documentation says the origin is ‘Dictionary upgrade failed to complete properly’ and suggests rebuilding Taxon Name Index. If this doesn’t work it will need to be investigated using Management Studio. Go To (key) doesn’t work on taxon determinations so you need to look up the corresponding taxon occurrence key and use that. But if the taxon list item key is invalid or missing the observation can’t be displayed in the observation hierarchy because there is no species name to display in the hierarchy on the left. The following query will give you the taxon occurrence key for taxon determination SR00026700003MVM:

Select Taxon_Determination_Key, Taxon_List_Item_Key, Taxon_Occurrence_Key
From Taxon_Determination Where Taxon_Determination_Key = 'SR00026700003MVM'

If the Taxon_List_Item_Key is blank or invalid you can set it to a valid key as follows:

Update Taxon_Determination Set Taxon_List_Item_Key = 'NBNSYS0000094797'
From Taxon_Determination Where Taxon_Determination_Key = 'SR00026700003MVM'

NBNSYS0000094797 is Wolf (Canis lupus) from the Recorder 3.3 list. You will then be able to Go To the observation and edit or delete it.

It shouldn’t be necessary in this case but it won’t do any harm.