diff --git a/patches.json-specification.md b/patches.json-specification.md
index 591762f..22148c8 100644
--- a/patches.json-specification.md
+++ b/patches.json-specification.md
@@ -84,6 +84,8 @@ For `"type": "number"`, the patch object has an object named `patch` with the fo
 
 For `"type": "group"`, these are not actually patches but placeholders for parenting up child patches.
 
+Groups were introduced in [this PR](https://github.com/spice2x/spice2x.github.io/pull/812), submitted July 2026. Previous versions of spice will see groups as *Invalid type* and show up as a red row, but can be safely ignored.
+
 |Property|Type|Description|
 |:-|:-|:-|
 |`type`|String|Must be "group"|