PCB Parsing: only parse old properties before PCB fields addition

pcbnew/pcb_io/kicad_sexpr/pcb_io_kicad_sexpr_parser.cpp

@@ -4051,6 +4051,10 @@ FOOTPRINT* PCB_IO_KICAD_SEXPR_PARSER::parseFOOTPRINT_unchecked( wxArrayString* a
             NeedSYMBOL();
             wxString pValue = FromUTF8();
 
+            // Prior to PCB fields, we used to use properties for special values instead of
+            // using (keyword_example "value")
+            if( m_requiredVersion < 20230620 )
+            {
                 // Skip legacy non-field properties sent from symbols that should not be kept
                 // in footprints.
                 if( pName == "ki_keywords" || pName == "ki_locked" )
@@ -4089,6 +4093,7 @@ FOOTPRINT* PCB_IO_KICAD_SEXPR_PARSER::parseFOOTPRINT_unchecked( wxArrayString* a
                     NeedRIGHT();
                     break;
                 }
+            }
 
             PCB_FIELD* field = nullptr;