Index: openacs-4/packages/categories/www/cadmin/category-link-delete.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/cadmin/category-link-delete.tcl,v
diff -u -r1.9.2.3 -r1.9.2.4
--- openacs-4/packages/categories/www/cadmin/category-link-delete.tcl	20 Dec 2019 21:18:10 -0000	1.9.2.3
+++ openacs-4/packages/categories/www/cadmin/category-link-delete.tcl	3 May 2020 17:39:48 -0000	1.9.2.4
@@ -43,7 +43,7 @@
            acs_permission.permission_p(c.tree_id,:user_id,'category_tree_write') as write_p,
            l.link_id
     from category_links l, categories c
-    where l.link_id in ([join $link_id ,])
+    where l.link_id in ([ns_dbquotelist $link_id])
     and ((l.from_category_id = :category_id
 	  and l.to_category_id = c.category_id)
 	 or (l.from_category_id = c.category_id