diff --git a/Mechanical Parts/Mountings/README.md b/Mechanical Parts/Mountings/README.md
index 19fc46d9..3ab62a95 100644
--- a/Mechanical Parts/Mountings/README.md	
+++ b/Mechanical Parts/Mountings/README.md	
@@ -101,10 +101,14 @@ The first 8 of Tr8 means it is to indicate the *diameter* (8mm) and the second 8
 
 #### Tr8x8 flange nut
 
+**IMPORTANT! Don't open this file in FreeCAD Link Branch from realthunder because of [this bug](https://github.com/realthunder/FreeCAD_assembly3/issues/1120).**
+
 ![Flange_nut](T8_screw_nut/Flange_nut/T8_Flange_nut.png)
 
 #### Tr8x8 anti backlash nut
 
+**IMPORTANT! Don't open this file in FreeCAD Link Branch from realthunder because of [this bug](https://github.com/realthunder/FreeCAD_assembly3/issues/1120).**
+
 ![Anti_backlash_nut](T8_screw_nut/Anti_backlash_nut/T8_antibacklash_nut.png)
 
 Don´t forget to share your modifications with the community.