diff --git a/app/vmbackup/README.md b/app/vmbackup/README.md
index b998f5c61..4be337306 100644
--- a/app/vmbackup/README.md
+++ b/app/vmbackup/README.md
@@ -383,7 +383,7 @@ Run `vmbackup -help` in order to see all the available options:
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -snapshot.createURL string
      VictoriaMetrics create snapshot url. When this is given a snapshot will automatically be created during backup. Example: http://victoriametrics:8428/snapshot/create . There is no need in setting -snapshotName if -snapshot.createURL is set
   -snapshot.deleteURL string
diff --git a/app/vmbackupmanager/README.md b/app/vmbackupmanager/README.md
index 258b5e8aa..deecd4858 100644
--- a/app/vmbackupmanager/README.md
+++ b/app/vmbackupmanager/README.md
@@ -525,7 +525,7 @@ command-line flags:
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -snapshot.createURL string
      VictoriaMetrics create snapshot url. When this is given a snapshot will automatically be created during backup.Example: http://victoriametrics:8428/snapshot/create
   -snapshot.deleteURL string
diff --git a/app/vmrestore/README.md b/app/vmrestore/README.md
index 4d483f1c7..141cc1e22 100644
--- a/app/vmrestore/README.md
+++ b/app/vmrestore/README.md
@@ -179,7 +179,7 @@ i.e. the end result would be similar to [rsync --delete](https://askubuntu.com/q
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -skipBackupCompleteCheck
      Whether to skip checking for 'backup complete' file in -src. This may be useful for restoring from old backups, which were created without 'backup complete' file
   -src string
diff --git a/docs/vmbackup.md b/docs/vmbackup.md
index 1c5bc3b01..0b461a39d 100644
--- a/docs/vmbackup.md
+++ b/docs/vmbackup.md
@@ -394,7 +394,7 @@ Run `vmbackup -help` in order to see all the available options:
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -snapshot.createURL string
      VictoriaMetrics create snapshot url. When this is given a snapshot will automatically be created during backup. Example: http://victoriametrics:8428/snapshot/create . There is no need in setting -snapshotName if -snapshot.createURL is set
   -snapshot.deleteURL string
diff --git a/docs/vmbackupmanager.md b/docs/vmbackupmanager.md
index 486a8237a..21f6032f1 100644
--- a/docs/vmbackupmanager.md
+++ b/docs/vmbackupmanager.md
@@ -536,7 +536,7 @@ command-line flags:
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -snapshot.createURL string
      VictoriaMetrics create snapshot url. When this is given a snapshot will automatically be created during backup.Example: http://victoriametrics:8428/snapshot/create
   -snapshot.deleteURL string
diff --git a/docs/vmrestore.md b/docs/vmrestore.md
index 239099932..e0f12cd3e 100644
--- a/docs/vmrestore.md
+++ b/docs/vmrestore.md
@@ -190,7 +190,7 @@ i.e. the end result would be similar to [rsync --delete](https://askubuntu.com/q
      Prefixing endpoint with bucket name when set false, true by default. (default true)
   -s3StorageClass string
      The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.
-     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/
+     See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html
   -skipBackupCompleteCheck
      Whether to skip checking for 'backup complete' file in -src. This may be useful for restoring from old backups, which were created without 'backup complete' file
   -src string
diff --git a/lib/backup/actions/util.go b/lib/backup/actions/util.go
index 046ff921e..a6836c90d 100644
--- a/lib/backup/actions/util.go
+++ b/lib/backup/actions/util.go
@@ -26,7 +26,7 @@ var (
 	s3ForcePathStyle = flag.Bool("s3ForcePathStyle", true, "Prefixing endpoint with bucket name when set false, true by default.")
 	s3StorageClass   = flag.String("s3StorageClass", "", "The Storage Class applied to objects uploaded to AWS S3. Supported values are: GLACIER, "+
 		"DEEP_ARCHIVE, GLACIER_IR, INTELLIGENT_TIERING, ONEZONE_IA, OUTPOSTS, REDUCED_REDUNDANCY, STANDARD, STANDARD_IA.\n"+
-		"See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html/")
+		"See https://docs.aws.amazon.com/AmazonS3/latest/userguide/storage-class-intro.html")
 )
 
 func runParallel(concurrency int, parts []common.Part, f func(p common.Part) error, progress func(elapsed time.Duration)) error {
diff --git a/lib/storage/storage.go b/lib/storage/storage.go
index 7d88d36c5..0ac02b1bb 100644
--- a/lib/storage/storage.go
+++ b/lib/storage/storage.go
@@ -1720,7 +1720,7 @@ func (s *Storage) add(rows []rawRow, dstMrs []*MetricRow, mrs []MetricRow, preci
 	for i := range mrs {
 		mr := &mrs[i]
 		if math.IsNaN(mr.Value) {
-			if !decimal.IsStaleNaN(mr.Value) {
+			if decimal.IsStaleNaN(mr.Value) {
 				// Skip NaNs other than Prometheus staleness marker, since the underlying encoding
 				// doesn't know how to work with them.
 				continue