Samsung Messages - receiving duplicate messages

[Galaxy_Girl64]

Why do I receive a duplicate message every time I send myself a text messsge on my Samsung S21+?

[meself]

Try clearing the cache in settings than apps scroll down to message than in storage tap than to clear the cache

[TayBae]

Does the same to me on any Samsung.❤

[DADDYBLAZE]

Why do I get the same duplicat Messages.
Messages after I send a text every time.