diff --git a/bbf/Makefile b/bbf/Makefile
index 0e43fe1ea..a12ee402b 100644
--- a/bbf/Makefile
+++ b/bbf/Makefile
@@ -5,7 +5,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libbbfdm
-PKG_VERSION:=6.9.0
+PKG_VERSION:=6.9.1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://dev.iopsys.eu/iopsys/bbf.git
@@ -76,7 +76,7 @@ define Package/userinterface
 endef
 
 define Package/userinterface/description
-  Package to add Device.UserInterface. datamodel support using libbbf JSON Plugin
+  Package to add Device.UserInterface. datamodel support
 endef
 
 define Package/libbbfdm/config
@@ -183,6 +183,7 @@ define Package/userinterface/install
 	$(INSTALL_DATA) ./files/lib/upgrade/keep.d/userinterface $(1)/lib/upgrade/keep.d/userinterface
 	$(INSTALL_BIN) ./files/etc/init.d/userinterface $(1)/etc/init.d/userinterface
 	$(INSTALL_BIN) ./files/etc/uci-defaults/93-userinterface-firewall $(1)/etc/uci-defaults/93-userinterface-firewall
+	$(INSTALL_BIN) ./files/etc/uci-defaults/94-userinterface-json $(1)/etc/uci-defaults/94-userinterface-json
 	$(INSTALL_BIN) ./files/etc/firewall.userinterface $(1)/etc/firewall.userinterface
 endef
 
diff --git a/bbf/files/etc/uci-defaults/94-userinterface-json b/bbf/files/etc/uci-defaults/94-userinterface-json
new file mode 100755
index 000000000..cfbb6c456
--- /dev/null
+++ b/bbf/files/etc/uci-defaults/94-userinterface-json
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# This deletes the userinterface json plugin if exists in case of upgrade
+if [ -f "/etc/bbfdm/json/UserInterface.json" ]; then
+	rm /etc/bbfdm/json/UserInterface.json
+fi
+
+exit 0
+