diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index b831ec450..49d676ef9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -59,6 +59,7 @@ It should contain the following entries:
     ]
     ```
     `metadata-version` key specifies the subdirectory where metadata for tested versions "lives".
+    `override` flag allows to express the intent to exclude outdated builtin metadata when set to `true`.
     So, the metadata for `org.example:library:0.0.1` and `org.example:library:0.0.2` is located at `metadata/org.example/library/0.0.1`.
 
    Make sure that each supported version is listed in `tested-version`, as that value is used in build tools to match metadata to a specific library.
diff --git a/metadata/io.netty/netty-buffer/4.1.80.Final/index.json b/metadata/io.netty/netty-buffer/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-buffer/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-buffer/index.json b/metadata/io.netty/netty-buffer/index.json
new file mode 100644
index 000000000..ccb88fb56
--- /dev/null
+++ b/metadata/io.netty/netty-buffer/index.json
@@ -0,0 +1,11 @@
+[
+  {
+    "latest": true,
+    "override": true,
+    "metadata-version": "4.1.80.Final",
+    "module": "io.netty:netty-buffer",
+    "tested-versions": [
+      "4.1.80.Final"
+    ]
+  }
+]
diff --git a/metadata/io.netty/netty-codec-http/4.1.80.Final/index.json b/metadata/io.netty/netty-codec-http/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-codec-http/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-codec-http/index.json b/metadata/io.netty/netty-codec-http/index.json
new file mode 100644
index 000000000..84ca9fbbc
--- /dev/null
+++ b/metadata/io.netty/netty-codec-http/index.json
@@ -0,0 +1,11 @@
+[
+  {
+    "latest": true,
+    "override": true,
+    "metadata-version": "4.1.80.Final",
+    "module": "io.netty:netty-codec-http",
+    "tested-versions": [
+      "4.1.80.Final"
+    ]
+  }
+]
diff --git a/metadata/io.netty/netty-codec-http2/4.1.80.Final/index.json b/metadata/io.netty/netty-codec-http2/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-codec-http2/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-codec-http2/index.json b/metadata/io.netty/netty-codec-http2/index.json
new file mode 100644
index 000000000..85a1395f3
--- /dev/null
+++ b/metadata/io.netty/netty-codec-http2/index.json
@@ -0,0 +1,11 @@
+[
+  {
+    "latest": true,
+    "override": true,
+    "metadata-version": "4.1.80.Final",
+    "module": "io.netty:netty-codec-http2",
+    "tested-versions": [
+      "4.1.80.Final"
+    ]
+  }
+]
diff --git a/metadata/io.netty/netty-common/index.json b/metadata/io.netty/netty-common/index.json
index 543224c4f..fa6da095b 100644
--- a/metadata/io.netty/netty-common/index.json
+++ b/metadata/io.netty/netty-common/index.json
@@ -1,6 +1,7 @@
 [
   {
     "latest": true,
+    "override": true,
     "metadata-version": "4.1.80.Final",
     "module": "io.netty:netty-common",
     "tested-versions": [
diff --git a/metadata/io.netty/netty-handler/4.1.80.Final/index.json b/metadata/io.netty/netty-handler/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-handler/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-handler/index.json b/metadata/io.netty/netty-handler/index.json
new file mode 100644
index 000000000..05609dee8
--- /dev/null
+++ b/metadata/io.netty/netty-handler/index.json
@@ -0,0 +1,11 @@
+[
+  {
+    "latest": true,
+    "override": true,
+    "metadata-version": "4.1.80.Final",
+    "module": "io.netty:netty-handler",
+    "tested-versions": [
+      "4.1.80.Final"
+    ]
+  }
+]
diff --git a/metadata/io.netty/netty-resolver-dns/4.1.80.Final/index.json b/metadata/io.netty/netty-resolver-dns/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-resolver-dns/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-resolver-dns/index.json b/metadata/io.netty/netty-resolver-dns/index.json
new file mode 100644
index 000000000..e2b886cea
--- /dev/null
+++ b/metadata/io.netty/netty-resolver-dns/index.json
@@ -0,0 +1,11 @@
+[
+  {
+    "latest": true,
+    "override": true,
+    "metadata-version": "4.1.80.Final",
+    "module": "io.netty:netty-resolver-dns",
+    "tested-versions": [
+      "4.1.80.Final"
+    ]
+  }
+]
diff --git a/metadata/io.netty/netty-transport/4.1.80.Final/index.json b/metadata/io.netty/netty-transport/4.1.80.Final/index.json
new file mode 100644
index 000000000..0d4f101c7
--- /dev/null
+++ b/metadata/io.netty/netty-transport/4.1.80.Final/index.json
@@ -0,0 +1,2 @@
+[
+]
diff --git a/metadata/io.netty/netty-transport/index.json b/metadata/io.netty/netty-transport/index.json
index 3fd4e28ba..b5621eecc 100644
--- a/metadata/io.netty/netty-transport/index.json
+++ b/metadata/io.netty/netty-transport/index.json
@@ -1,10 +1,12 @@
 [
   {
     "latest": true,
-    "metadata-version": "4.1.76.Final",
+    "override": true,
+    "metadata-version": "4.1.80.Final",
     "module": "io.netty:netty-transport",
     "tested-versions": [
-      "4.1.76.Final"
+      "4.1.76.Final",
+      "4.1.80.Final"
     ]
   }
 ]