Hey there gita19,
Thanks for using Apple Support Communities! We understand you are experiencing some issues with your Apple Watch pairing with your iPhone. We are happy to provide some guidance.
Did you try unpairing your Apple Watch from your iPhone to get the message as shown in the screenshot? If not, please use the following article to unpair the Apple Watch and re-pair it with your iPhone:
Unpair and erase your Apple Watch
If you continue to experience issues with pairing your Apple Watch with your iPhone, please reach out to Apple Support directly for further assistance: Get Support
We hope this information helps!
Cheers.