Append thrown exception about backup file, backup file not exist

[shubaivan]

Some problem with append, when I try to append file I faced with that

File not found at path: download_files/adrecord/baby_bjorn/20200909111536.csv.backup

DO message

Error executing "CopyObject" on "https://minimoj-consumer.ams3.digitaloceanspaces.com/minimoj-consumer/minimoj/download_files/adrecord/baby_bjorn/20200909113824.csv.backup"; AWS HTTP error: Client error: `PUT https://minimoj-consumer.ams3.digitaloceanspaces.com/minimoj-consumer/minimoj/download_files/adrecord/baby_bjorn/20200909113824.csv.backup` resulted in a `404 Not Found` response:
<?xml version="1.0" encoding="UTF-8"?><Error><Code>NoSuchKey</Code><BucketName>minimoj-consumer</BucketName><RequestId>t (truncated...)
 NoSuchKey (client):  - <?xml version="1.0" encoding="UTF-8"?><Error><Code>NoSuchKey</Code><BucketName>minimoj-consumer</BucketName><RequestId>tx0000000000000832ab176-005f58bf08-ab90b1-ams3b</RequestId><HostId>ab90b1-ams3b-ams3-zg02</HostId></Error>

this is data for CopyObject command

data = {array} [6]
 Bucket = "minimoj-consumer"
 Key = "minimoj/download_files/adrecord/baby_bjorn/20200909113824.csv.backup"
 CopySource = "minimoj-consumer/minimoj/download_files/adrecord/baby_bjorn/20200909113824.csv"
 ACL = "private"
 @http = {array} [0]
 @context = {array} [0]

what could be wrong, how to fix it ?

[kevengodet]

This message occurs after the original file has been saved by renaming it <original name>.backup.
Maybe your storage provider does not allow you to create a new file or rename an existing file (check your quotas).
Is there any other error message before the one you pasted?