skip imports for existing resources

internal/terraform/context_plan2_test.go

@@ -4356,7 +4356,7 @@ import {
 			t.Errorf("wrong action reason\ngot:  %s\nwant: %s", got, want)
 		}
 		if instPlan.Importing != nil {
-			t.Errorf("expected non-import change, got import change %+v", instPlan.Importing)
+			t.Errorf("expected non-import change, got import change %#v", instPlan.Importing)
 		}
 	})
 }

internal/terraform/node_resource_plan.go

@@ -5,6 +5,7 @@ package terraform
 
 import (
 	"fmt"
+	"log"
 	"strings"
 
 	"github.com/hashicorp/hcl/v2"
@@ -384,6 +385,15 @@ func (n nodeExpandPlannableResource) expandResourceImports(ctx EvalContext, addr
 		}
 	}
 
+	// filter out any import which already exist in state
+	state := ctx.State()
+	for _, el := range imports.Elements() {
+		if state.ResourceInstance(el.Key) != nil {
+			log.Printf("[DEBUG] import address %s already in state", el.Key)
+			imports.Remove(el.Key)
+		}
+	}
+
 	return imports, diags
 }