diff --git a/579.myco b/579.myco
deleted file mode 100644
index 82a7c27..0000000
--- a/579.myco
+++ /dev/null
@@ -1,3 +0,0 @@
-= 579
-https://corvid.cafe/psl.html
-
diff --git a/646.myco b/646.myco
new file mode 100644
index 0000000..5cf6945
--- /dev/null
+++ b/646.myco
@@ -0,0 +1,3 @@
+= 646
+https://communitywiki.org/wiki/StructureOfWikis
+
diff --git a/CommunityWiki: Structure Of Wikis.myco b/CommunityWiki: Structure Of Wikis.myco
new file mode 100644
index 0000000..75211bc
--- /dev/null
+++ b/CommunityWiki: Structure Of Wikis.myco	
@@ -0,0 +1,3 @@
+= CommunityWiki: Structure Of Wikis
+https://communitywiki.org/wiki/StructureOfWikis
+
diff --git a/Plains Sign Language reference.myco b/Plains Sign Language reference.myco
deleted file mode 100644
index a8cc64d..0000000
--- a/Plains Sign Language reference.myco	
+++ /dev/null
@@ -1,3 +0,0 @@
-= Plains Sign Language reference
-https://corvid.cafe/psl.html
-