diff --git a/d2ir/compile.go b/d2ir/compile.go
index ab087470f..20a03b103 100644
--- a/d2ir/compile.go
+++ b/d2ir/compile.go
@@ -155,9 +155,6 @@ func (c *compiler) compileField(dst *Map, kp *d2ast.KeyPath, refctx *RefContext)
 		c.err.Errors = append(c.err.Errors, err.(d2ast.Error))
 		return
 	}
-	if f.Inherited {
-		f.Inherited = false
-	}
 
 	if refctx.Key.Primary.Unbox() != nil {
 		f.Primary_ = &Scalar{
diff --git a/d2ir/d2ir.go b/d2ir/d2ir.go
index 89b82081b..711d61f2a 100644
--- a/d2ir/d2ir.go
+++ b/d2ir/d2ir.go
@@ -197,24 +197,7 @@ func (m *Map) CopyBase(newParent Node) *Map {
 	scenarios := m.DeleteField("scenarios")
 	steps := m.DeleteField("steps")
 
-	had := make(map[string]struct{})
-	if parentM, ok := newParent.(*Map); ok {
-		for _, f := range parentM.Fields {
-			had[f.Name] = struct{}{}
-		}
-	}
-	// TODO pretty sure you don't need one for edges.
-	// Maybe if both boards had a (x -> y)[0]?
-
 	m2 := m.Copy(newParent).(*Map)
-	for i := range m2.Fields {
-		// if _, ok := had[m2.Fields[i].Name]; !ok {
-		m2.Fields[i].Inherited = true
-		// }
-	}
-	for i := range m2.Edges {
-		m2.Edges[i].Inherited = true
-	}
 	if layers != nil {
 		m.Fields = append(m.Fields, layers)
 	}
@@ -295,9 +278,6 @@ type Field struct {
 	Composite Composite `json:"composite,omitempty"`
 
 	References []*FieldReference `json:"references,omitempty"`
-
-	// Whether it's from a parent board or imported
-	Inherited bool `json:"inherited"`
 }
 
 func (f *Field) Copy(newParent Node) Node {
@@ -452,8 +432,6 @@ type Edge struct {
 	Map_     *Map    `json:"map,omitempty"`
 
 	References []*EdgeReference `json:"references,omitempty"`
-
-	Inherited bool `json:"inherited"`
 }
 
 func (e *Edge) Copy(newParent Node) Node {
diff --git a/d2ir/merge.go b/d2ir/merge.go
index 7cb4748aa..15ba2a9ec 100644
--- a/d2ir/merge.go
+++ b/d2ir/merge.go
@@ -4,9 +4,7 @@ func OverlayMap(base, overlay *Map) {
 	for _, of := range overlay.Fields {
 		bf := base.GetField(of.Name)
 		if bf == nil {
-			f := of.Copy(base).(*Field)
-			f.Inherited = true
-			base.Fields = append(base.Fields, f)
+			base.Fields = append(base.Fields, of.Copy(base).(*Field))
 			continue
 		}
 		OverlayField(bf, of)
@@ -15,9 +13,7 @@ func OverlayMap(base, overlay *Map) {
 	for _, oe := range overlay.Edges {
 		bea := base.GetEdges(oe.ID)
 		if len(bea) == 0 {
-			e := oe.Copy(base).(*Edge)
-			e.Inherited = true
-			base.Edges = append(base.Edges, e)
+			base.Edges = append(base.Edges, oe.Copy(base).(*Edge))
 			continue
 		}
 		be := bea[0]