[Python] Python, PyKeePass - cant append new tag to entry

I cant find out way how to append new tag in entry via PyKeePass first of all lets show my code i was expecting should work:

# env='ACC'
def appendTagKP(env):
kp = PyKeePass(r'D:\users\\NewDatabase.kdbx', password=decodeStr(kp_password))

test = kp.find_entries(tags='test', first=False)
if test:
for i in test:
print(i.title)
i.tags.append(env)
print(f'After tags edit: {i.tags}')
print(i.password)
kp.save()


Type of "i.tags" is 'LIST' thats why i expecting that append should work...

In kdbx i have two entries that already have one tag "test":

Title: jhr

tags: ['test']

and

Title: jhrjhr

tags: ['test']

When i run this code, output is just those prints without new tags, i've alreday tried some small edits thats to AI and google but nothing helped. This is my last chance

My expect is output where my entries have two tags: After tags edit: ['test','ACC']

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