diff --git a/pkg/sql/opt/memo/memo.go b/pkg/sql/opt/memo/memo.go
index 291c21d29b1d..6dab468075f2 100644
--- a/pkg/sql/opt/memo/memo.go
+++ b/pkg/sql/opt/memo/memo.go
@@ -363,6 +363,11 @@ func (m *Memo) NextID() opt.ScalarID {
 	return m.curID
 }
 
+// CopyNextIDFrom copies the next ScalarID from the other memo.
+func (m *Memo) CopyNextIDFrom(other *Memo) {
+	m.curID = other.curID
+}
+
 // RequestColStat calculates and returns the column statistic calculated on the
 // relational expression.
 func (m *Memo) RequestColStat(
diff --git a/pkg/sql/opt/norm/factory.go b/pkg/sql/opt/norm/factory.go
index c0b744db9c4c..ba799e6c8e65 100644
--- a/pkg/sql/opt/norm/factory.go
+++ b/pkg/sql/opt/norm/factory.go
@@ -215,6 +215,11 @@ func (f *Factory) CopyAndReplace(
 		panic(errors.AssertionFailedf("destination memo must be empty"))
 	}
 
+	// Copy the next scalar ID to the target memo so that new scalar expressions
+	// built with the new memo will not share scalar IDs with existing
+	// expressions.
+	f.mem.CopyNextIDFrom(from.Memo())
+
 	// Copy all metadata to the target memo so that referenced tables and
 	// columns can keep the same ids they had in the "from" memo. Scalar
 	// expressions in the metadata cannot have placeholders, so we simply copy
diff --git a/pkg/sql/opt/norm/testdata/rules/select b/pkg/sql/opt/norm/testdata/rules/select
index 8abbfb7c2977..dba4158db251 100644
--- a/pkg/sql/opt/norm/testdata/rules/select
+++ b/pkg/sql/opt/norm/testdata/rules/select
@@ -549,6 +549,28 @@ select
       ├── (u:1 = 10) OR (v:2 = 20) [outer=(1,2)]
       └── (v:2 = 20) OR (u:1 = 10) [outer=(1,2)]
 
+# Regression test for #71002. DeduplicateSelectFilters should not remove filters
+# that are not duplicated.
+exec-ddl
+create table t71002 (
+  a BOOL,
+  b BOOL,
+  c BOOL
+)
+----
+
+assign-placeholders-norm query-args=(false)
+SELECT * FROM t71002 WHERE a AND (b OR ($1 OR c))
+----
+select
+ ├── columns: a:1!null b:2 c:3
+ ├── fd: ()-->(1)
+ ├── scan t71002
+ │    └── columns: a:1 b:2 c:3
+ └── filters
+      ├── a:1 [outer=(1), constraints=(/1: [/true - /true]; tight), fd=()-->(1)]
+      └── b:2 OR c:3 [outer=(2,3)]
+
 # --------------------------------------------------
 # MergeSelects
 # --------------------------------------------------