diff --git a/ddtrace/v1.go b/ddtrace/v1.go
deleted file mode 100644
index 225a74c619..0000000000
--- a/ddtrace/v1.go
+++ /dev/null
@@ -1,28 +0,0 @@
-// Unless explicitly stated otherwise all files in this repository are licensed
-// under the Apache License Version 2.0.
-// This product includes software developed at Datadog (https://www.datadoghq.com/).
-// Copyright 2025 Datadog, Inc.
-
-package ddtrace
-
-import (
-	"github.com/DataDog/dd-trace-go/v2/internal/log"
-	"github.com/DataDog/dd-trace-go/v2/internal/version"
-)
-
-func init() {
-	checkV1NonTransitional()
-}
-
-func checkV1NonTransitional() {
-	version, transitional, found := version.FindV1Version()
-	if !found {
-		// No v1 version detected
-		return
-	}
-	if transitional {
-		// v1 version is transitional
-		return
-	}
-	log.Warn("Detected %q non-transitional version of dd-trace-go. This version is not compatible with v2 - please upgrade to v1.74.0 or later", version)
-}
diff --git a/internal/version/version.go b/internal/version/version.go
index 56b5a58e5c..70dfa13310 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -6,10 +6,8 @@
 package version
 
 import (
-	"runtime/debug"
 	"strconv"
 	"strings"
-	"sync"
 
 	"golang.org/x/mod/semver"
 )
@@ -36,56 +34,8 @@ var (
 	Patch int
 	// RC is the current release candidate version number
 	RC int
-	// once is used to ensure that the v1 version is only found once
-	once sync.Once
 )
 
-func FindV1Version() (string, bool, bool) {
-	once.Do(func() {
-		info, ok := debug.ReadBuildInfo()
-		if !ok {
-			return
-		}
-		v1Tag = findV1Version(info.Deps)
-	})
-	if v1Tag == nil {
-		return "", false, false
-	}
-	return v1Tag.Version, v1Tag.Transitional, true
-}
-
-func init() {
-	// Check if we are using a transitional v1.74.x or later version
-	vt, _, found := FindV1Version()
-	if found {
-		Tag = vt
-	}
-	v := parseVersion(Tag)
-	Major, Minor, Patch, RC = v.Major, v.Minor, v.Patch, v.RC
-}
-
-func findV1Version(deps []*debug.Module) *v1version {
-	var version string
-	for _, dep := range deps {
-		if dep.Path != "gopkg.in/DataDog/dd-trace-go.v1" {
-			continue
-		}
-		version = dep.Version
-		break
-	}
-	if version == "" {
-		return nil
-	}
-	vt := &v1version{
-		Version: version,
-	}
-	v := parseVersion(vt.Version)
-	if v.Major == 1 && v.Minor >= 74 {
-		vt.Transitional = true
-	}
-	return vt
-}
-
 type version struct {
 	Major int
 	Minor int
diff --git a/internal/version/version_test.go b/internal/version/version_test.go
index 7c9e84bc0b..7b3af726b1 100644
--- a/internal/version/version_test.go
+++ b/internal/version/version_test.go
@@ -8,7 +8,6 @@ package version
 import (
 	"bytes"
 	"os/exec"
-	"runtime/debug"
 	"strconv"
 	"strings"
 	"testing"
@@ -55,67 +54,6 @@ func unixDate(u string) (time.Time, error) {
 	return time.Unix(sec, 0), nil
 }
 
-func TestFindV1Version(t *testing.T) {
-	tests := []struct {
-		deps     []*debug.Module
-		expected *v1version
-	}{
-		{
-			deps: []*debug.Module{
-				{Path: "gopkg.in/DataDog/dd-trace-go.v1", Version: "v1.2.3-rc.12"},
-			},
-			expected: &v1version{
-				Version: "v1.2.3-rc.12",
-			},
-		},
-		{
-			deps: []*debug.Module{
-				{Path: "gopkg.in/DataDog/dd-trace-go.v1", Version: "v1.74.0"},
-			},
-			expected: &v1version{
-				Version:      "v1.74.0",
-				Transitional: true,
-			},
-		},
-		{
-			deps: []*debug.Module{
-				{Path: "gopkg.in/DataDog/dd-trace-go.v1", Version: "v1.73.1"},
-			},
-			expected: &v1version{
-				Version: "v1.73.1",
-			},
-		},
-		{
-			deps:     []*debug.Module{},
-			expected: nil,
-		},
-		{
-			deps: []*debug.Module{
-				{Path: "github.com/DataDog/dd-trace-go/v2", Version: "v2.0.0"},
-			},
-			expected: nil,
-		},
-	}
-	for _, c := range tests {
-		vt := findV1Version(c.deps)
-		if c.expected == nil {
-			if vt != nil {
-				t.Fatalf("got %v, expected nil", vt)
-			}
-			continue
-		}
-		if vt == nil {
-			t.Fatalf("got nil, expected *v1version")
-		}
-		if vt.Version != c.expected.Version {
-			t.Fatalf("got %s, expected %s", vt.Version, c.expected.Version)
-		}
-		if vt.Transitional != c.expected.Transitional {
-			t.Fatalf("got %t, expected %t", vt.Transitional, c.expected.Transitional)
-		}
-	}
-}
-
 func TestParseVersion(t *testing.T) {
 	tc := []struct {
 		version string