species with null taxonomic_status are now changed to use empty string instead, also change emptySpecies taxonomic_status from null to empty string

frontend/src/components/DetailView/common/defaultValues.ts

@@ -128,7 +128,7 @@ export const emptySpecies = {
   genus_name: '',
   species_name: '',
   unique_identifier: '-',
-  taxonomic_status: null,
+  taxonomic_status: '',
   common_name: '',
   sp_author: '',
   strain: null,

frontend/src/components/Species/SpeciesDetails.tsx

@@ -41,7 +41,7 @@ export const SpeciesDetails = () => {
   }, [deleteSuccess, deleteError, notify, navigate])
 
   useEffect(() => {
-    // changes subclass, suborder, and subfamily from null to empty string to make validators work
+    // changes subclass, suborder, subfamily and taxonomic_status from null to empty string to make validators work
     // this should be removed if validators are improved in the future
     if (data) {
       const fixedSpeciesData = fixNullValuesInTaxonomyFields(data)

frontend/src/util/taxonomyUtilities.tsx

@@ -346,6 +346,7 @@ export const fixNullValuesInTaxonomyFields = (species: Species | SpeciesDetailsT
     subclass_or_superorder_name: species.subclass_or_superorder_name ?? '',
     suborder_or_superfamily_name: species.suborder_or_superfamily_name ?? '',
     subfamily_name: species.subfamily_name ?? '',
+    taxonomic_status: species.taxonomic_status ?? '',
   }
 }