doveadm and some different output

I use the following command for generating password:
Code:
/usr/local/etc/dovecot{238}# doveadm pw -s SHA512-CRYPT -u mohsen@pahlevanzadeh.net
Enter new password:
Retype new password:
{SHA512-CRYPT}$6$VuFPA9s.I0QQ2qaT$/iYlIZAcEZa2D7eVoCyrrucS8PwA6GuaUeA.JPp0c2l1DfKVuR8U8D0E0HylB4Ze4UnxjeWJDM5iw1CyRW4GH1
/usr/local/etc/dovecot{239}# doveadm pw -s SHA512-CRYPT -u mohsen@pahlevanzadeh.net
Enter new password:
Retype new password:
{SHA512-CRYPT}$6$0XQ0IArdMySuVxog$mPmTJcStiTAuNGdNftO0Skn6r0I3uu6db9MJLnP7zS1AxR1ZDk1ebPLdoZXxVyhNuQ8OxyxEU291C/jVvaVCw1

But I get two different output for one password.
I remember sha512 was hash algorithm, But why it generates two output?
 
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