diff --git a/prompb/write/v2/types.pb.go b/prompb/write/v2/types.pb.go
index 8ebd561fd..1edb6a748 100644
--- a/prompb/write/v2/types.pb.go
+++ b/prompb/write/v2/types.pb.go
@@ -27,36 +27,36 @@ const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 type Metadata_MetricType int32
 
 const (
-	Metadata_UNKNOWN        Metadata_MetricType = 0
-	Metadata_COUNTER        Metadata_MetricType = 1
-	Metadata_GAUGE          Metadata_MetricType = 2
-	Metadata_HISTOGRAM      Metadata_MetricType = 3
-	Metadata_GAUGEHISTOGRAM Metadata_MetricType = 4
-	Metadata_SUMMARY        Metadata_MetricType = 5
-	Metadata_INFO           Metadata_MetricType = 6
-	Metadata_STATESET       Metadata_MetricType = 7
+	Metadata_METRIC_TYPE_UNSPECIFIED    Metadata_MetricType = 0
+	Metadata_METRIC_TYPE_COUNTER        Metadata_MetricType = 1
+	Metadata_METRIC_TYPE_GAUGE          Metadata_MetricType = 2
+	Metadata_METRIC_TYPE_HISTOGRAM      Metadata_MetricType = 3
+	Metadata_METRIC_TYPE_GAUGEHISTOGRAM Metadata_MetricType = 4
+	Metadata_METRIC_TYPE_SUMMARY        Metadata_MetricType = 5
+	Metadata_METRIC_TYPE_INFO           Metadata_MetricType = 6
+	Metadata_METRIC_TYPE_STATESET       Metadata_MetricType = 7
 )
 
 var Metadata_MetricType_name = map[int32]string{
-	0: "UNKNOWN",
-	1: "COUNTER",
-	2: "GAUGE",
-	3: "HISTOGRAM",
-	4: "GAUGEHISTOGRAM",
-	5: "SUMMARY",
-	6: "INFO",
-	7: "STATESET",
+	0: "METRIC_TYPE_UNSPECIFIED",
+	1: "METRIC_TYPE_COUNTER",
+	2: "METRIC_TYPE_GAUGE",
+	3: "METRIC_TYPE_HISTOGRAM",
+	4: "METRIC_TYPE_GAUGEHISTOGRAM",
+	5: "METRIC_TYPE_SUMMARY",
+	6: "METRIC_TYPE_INFO",
+	7: "METRIC_TYPE_STATESET",
 }
 
 var Metadata_MetricType_value = map[string]int32{
-	"UNKNOWN":        0,
-	"COUNTER":        1,
-	"GAUGE":          2,
-	"HISTOGRAM":      3,
-	"GAUGEHISTOGRAM": 4,
-	"SUMMARY":        5,
-	"INFO":           6,
-	"STATESET":       7,
+	"METRIC_TYPE_UNSPECIFIED":    0,
+	"METRIC_TYPE_COUNTER":        1,
+	"METRIC_TYPE_GAUGE":          2,
+	"METRIC_TYPE_HISTOGRAM":      3,
+	"METRIC_TYPE_GAUGEHISTOGRAM": 4,
+	"METRIC_TYPE_SUMMARY":        5,
+	"METRIC_TYPE_INFO":           6,
+	"METRIC_TYPE_STATESET":       7,
 }
 
 func (x Metadata_MetricType) String() string {
@@ -70,24 +70,24 @@ func (Metadata_MetricType) EnumDescriptor() ([]byte, []int) {
 type Histogram_ResetHint int32
 
 const (
-	Histogram_UNKNOWN Histogram_ResetHint = 0
-	Histogram_YES     Histogram_ResetHint = 1
-	Histogram_NO      Histogram_ResetHint = 2
-	Histogram_GAUGE   Histogram_ResetHint = 3
+	Histogram_RESET_HINT_UNSPECIFIED Histogram_ResetHint = 0
+	Histogram_RESET_HINT_YES         Histogram_ResetHint = 1
+	Histogram_RESET_HINT_NO          Histogram_ResetHint = 2
+	Histogram_RESET_HINT_GAUGE       Histogram_ResetHint = 3
 )
 
 var Histogram_ResetHint_name = map[int32]string{
-	0: "UNKNOWN",
-	1: "YES",
-	2: "NO",
-	3: "GAUGE",
+	0: "RESET_HINT_UNSPECIFIED",
+	1: "RESET_HINT_YES",
+	2: "RESET_HINT_NO",
+	3: "RESET_HINT_GAUGE",
 }
 
 var Histogram_ResetHint_value = map[string]int32{
-	"UNKNOWN": 0,
-	"YES":     1,
-	"NO":      2,
-	"GAUGE":   3,
+	"RESET_HINT_UNSPECIFIED": 0,
+	"RESET_HINT_YES":         1,
+	"RESET_HINT_NO":          2,
+	"RESET_HINT_GAUGE":       3,
 }
 
 func (x Histogram_ResetHint) String() string {
@@ -416,7 +416,7 @@ func (m *Metadata) GetType() Metadata_MetricType {
 	if m != nil {
 		return m.Type
 	}
-	return Metadata_UNKNOWN
+	return Metadata_METRIC_TYPE_UNSPECIFIED
 }
 
 func (m *Metadata) GetHelpRef() uint32 {
@@ -653,7 +653,7 @@ func (m *Histogram) GetResetHint() Histogram_ResetHint {
 	if m != nil {
 		return m.ResetHint
 	}
-	return Histogram_UNKNOWN
+	return Histogram_RESET_HINT_UNSPECIFIED
 }
 
 func (m *Histogram) GetTimestamp() int64 {
@@ -748,59 +748,62 @@ func init() {
 func init() { proto.RegisterFile("write/v2/types.proto", fileDescriptor_4919b8b88a093366) }
 
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+	0x65, 0x2e, 0x44, 0x8e, 0x04, 0x7e, 0x91, 0x66, 0xfb, 0x02, 0xd4, 0x82, 0x2e, 0x0e, 0x58, 0x93,
+	0x01, 0x11, 0x69, 0x65, 0xca, 0x38, 0xe4, 0x08, 0x5a, 0x3e, 0x5d, 0xdb, 0xdc, 0xd9, 0x51, 0x8b,
+	0x85, 0xb6, 0xcf, 0xb4, 0xfa, 0xfe, 0x7f, 0x98, 0xf1, 0x76, 0xf1, 0x33, 0xe5, 0x46, 0x68, 0xfb,
+	0xc9, 0xa3, 0x6a, 0xa6, 0x0e, 0x81, 0x31, 0xfc, 0x39, 0x3c, 0xc9, 0x8e, 0x58, 0x52, 0x97, 0xdb,
+	0x4c, 0x6b, 0x74, 0x95, 0x3e, 0x26, 0xd9, 0xc9, 0xaf, 0x25, 0xfa, 0x48, 0x28, 0xb3, 0x31, 0x0d,
+	0xba, 0x4a, 0x1f, 0xe5, 0x42, 0x19, 0x8c, 0x89, 0x50, 0x61, 0xc0, 0x9c, 0x42, 0xa8, 0xc3, 0x0f,
+	0x87, 0x4a, 0x1d, 0x59, 0xa8, 0xec, 0x88, 0x24, 0xd4, 0x51, 0x1c, 0x2a, 0x85, 0xf3, 0x50, 0x99,
+	0x30, 0x09, 0xd5, 0x8c, 0x43, 0xa5, 0x70, 0x12, 0xea, 0x1c, 0x20, 0xa2, 0x8c, 0x72, 0x6b, 0x23,
+	0x26, 0xdf, 0xda, 0x7f, 0x6d, 0xd9, 0xe6, 0x0c, 0x88, 0x50, 0x4d, 0x1c, 0x9f, 0x93, 0x46, 0x94,
+	0x7e, 0x3e, 0x7e, 0xd0, 0x4f, 0xf6, 0x1f, 0xf4, 0x12, 0x1a, 0x99, 0x0b, 0x9f, 0xc0, 0x33, 0x22,
+	0x56, 0xd2, 0x9a, 0x4c, 0xe7, 0xe6, 0xde, 0xbb, 0xc2, 0xd0, 0x2a, 0x70, 0xb7, 0xba, 0xa1, 0x22,
+	0xdc, 0x86, 0x66, 0x01, 0x9b, 0x5f, 0xab, 0x25, 0xb1, 0xfa, 0x05, 0x28, 0x7e, 0x64, 0xca, 0xb8,
+	0x06, 0x15, 0x79, 0xc3, 0xf1, 0x11, 0x40, 0xbe, 0x20, 0xbd, 0x73, 0x80, 0x7c, 0x9a, 0x62, 0x47,
+	0x83, 0xd5, 0x8a, 0xd1, 0x78, 0xe9, 0xdb, 0x24, 0xa9, 0x04, 0xee, 0x52, 0x7f, 0xcd, 0x37, 0x72,
+	0xd7, 0x9b, 0x24, 0xa9, 0xc6, 0xc7, 0x6f, 0x1f, 0x4e, 0xd1, 0x9f, 0x0f, 0xa7, 0xe8, 0xdf, 0x87,
+	0x53, 0xf4, 0x53, 0x4d, 0xce, 0x63, 0x37, 0xbc, 0xab, 0xca, 0x9f, 0xb9, 0x6f, 0xfe, 0x0f, 0x00,
+	0x00, 0xff, 0xff, 0x68, 0x88, 0x14, 0xcb, 0x1e, 0x07, 0x00, 0x00,
 }
 
 func (m *WriteRequest) Marshal() (dAtA []byte, err error) {
diff --git a/prompb/write/v2/types.proto b/prompb/write/v2/types.proto
index c225aa9ac..ad225025e 100644
--- a/prompb/write/v2/types.proto
+++ b/prompb/write/v2/types.proto
@@ -61,14 +61,14 @@ message Sample {
 
 message Metadata {
   enum MetricType {
-    UNKNOWN        = 0;
-    COUNTER        = 1;
-    GAUGE          = 2;
-    HISTOGRAM      = 3;
-    GAUGEHISTOGRAM = 4;
-    SUMMARY        = 5;
-    INFO           = 6;
-    STATESET       = 7;
+    METRIC_TYPE_UNSPECIFIED        = 0;
+    METRIC_TYPE_COUNTER        = 1;
+    METRIC_TYPE_GAUGE          = 2;
+    METRIC_TYPE_HISTOGRAM      = 3;
+    METRIC_TYPE_GAUGEHISTOGRAM = 4;
+    METRIC_TYPE_SUMMARY        = 5;
+    METRIC_TYPE_INFO           = 6;
+    METRIC_TYPE_STATESET       = 7;
   }
   MetricType type = 1;
   uint32 help_ref = 3;
@@ -83,10 +83,10 @@ message Metadata {
 // integer histogram as well as a float histogram.
 message Histogram {
   enum ResetHint {
-    UNKNOWN = 0; // Need to test for a counter reset explicitly.
-    YES     = 1; // This is the 1st histogram after a counter reset.
-    NO      = 2; // There was no counter reset between this and the previous Histogram.
-    GAUGE   = 3; // This is a gauge histogram where counter resets don't happen.
+    RESET_HINT_UNSPECIFIED = 0; // Need to test for a counter reset explicitly.
+    RESET_HINT_YES     = 1; // This is the 1st histogram after a counter reset.
+    RESET_HINT_NO      = 2; // There was no counter reset between this and the previous Histogram.
+    RESET_HINT_GAUGE   = 3; // This is a gauge histogram where counter resets don't happen.
   }
 
   oneof count { // Count of observations in the histogram.