[#3763] Add ChangeLog entry

diff --git a/changelog_unreleased/3763-updating-lease-in-a-mysql-backend-fails-with-json_extract-error b/changelog_unreleased/3763-updating-lease-in-a-mysql-backend-fails-with-json_extract-error
new file mode 100644 (file)
index 0000000..6574a11
--- /dev/null
+++ b/changelog_unreleased/3763-updating-lease-in-a-mysql-backend-fails-with-json_extract-error
@@ -0,0 +1,6 @@
+[bug]          andrei
+       A MySQL error that rarely occurs in unknown circumstances that
+       can prevent Kea from renewing leases that have null or invalid
+       JSON values in the user_context column is now handled in the
+       lease triggers.
+       (Gitlab #3763)