Update problem to 1.14.1

Hello!
I use zigbee2MQTT 1.12.0, and tried to update it to current version according instructions here.
On command “git pull” I got this:

Updating 840b9d9..7e46435

error: Your local changes to the following files would be overwritten by merg e:
.github/ISSUE_TEMPLATE.md
.gitignore
README.md
azure-pipelines.yaml
docker/Dockerfile
docker/run.sh
lib/controller.js
lib/eventBus.js
lib/extension/baseExtension.js
lib/extension/bridgeConfig.js
lib/extension/deviceAvailability.js
lib/extension/deviceBind.js
lib/extension/deviceConfigure.js
lib/extension/deviceEvent.js
lib/extension/deviceGroupMembership.js
lib/extension/deviceReport.js
lib/extension/entityPublish.js
lib/extension/groups.js
lib/extension/homeassistant.js
lib/extension/networkMap.js
lib/extension/otaUpdate.js
lib/extension/softReset.js
lib/mqtt.js
lib/state.js
lib/util/logger.js
lib/util/settings.js
lib/util/utils.js
lib/util/yaml.js
lib/zigbee.js
package.json
test/bridgeConfig.test.js
test/controller.test.js
test/deviceAvailability.test.js
test/deviceBind.test.js
test/deviceConfigure.test.js
test/deviceEvent.test.js
test/deviceReport.test.js
test/entityPublish.test.js
test/group.test.js
test/homeassistant.test.js
test/logger.test.js
test/networkMap.test.js
test/otaUpdate.test.js
test/settings.test.js
test/stub/data.js
test/stub/zigbeeHerdsman.js
Please, commit your changes or stash them before you can merge.
Aborting

My os is ubuntu 16.04.
Do somebody know, how to fix it?
Thanks!

It seems git is thinking you changed these files. Save your data-directory (not in /opt/zigbee2mqtt !), and do a

sudo git clone https://github.com/Koenkk/zigbee2mqtt.git /opt/zigbee2mqtt

again.