Update schematics.mdoc

src/content/wiki/tutorials/schematics.mdoc

@@ -517,6 +517,7 @@ Percentage based harvesting fields will attempt to place a minimum percentage of
 - Use capital letters or punctuation (or spaces) in your schematic names; all lower-case is preferred.
 - Put a number anywhere in the schematic name except right at the end to indicate level
 - Put a unique item (something with special data, such as a written book or a patterned banner) into an item frame, chest, or other container (lecterns are ok). Also avoid putting complex-dyed armor anywhere; single-dyed is ok but remember that the player will have to figure out and duplicate it.
+- Don't use Tag Anchor blocks in schematics that have a Decoration Controller or a Hut Block
 
 ## Additional Information