diff --git a/bitnami/mongodb/4.2/debian-10/Dockerfile b/bitnami/mongodb/4.2/debian-10/Dockerfile
index 19cdbf1a3797..52cf0517141d 100644
--- a/bitnami/mongodb/4.2/debian-10/Dockerfile
+++ b/bitnami/mongodb/4.2/debian-10/Dockerfile
@@ -25,7 +25,7 @@ RUN curl --silent -L https://github.com/mikefarah/yq/releases/download/2.4.0/yq_
 COPY rootfs /
 RUN /postunpack.sh
 ENV BITNAMI_APP_NAME="mongodb" \
-    BITNAMI_IMAGE_VERSION="4.2.3-debian-10-r9" \
+    BITNAMI_IMAGE_VERSION="4.2.3-debian-10-r10" \
     NAMI_PREFIX="/.nami" \
     PATH="/opt/bitnami/mongodb/bin:$PATH"
 
diff --git a/bitnami/mongodb/4.2/debian-10/prebuildfs/libfile.sh b/bitnami/mongodb/4.2/debian-10/prebuildfs/libfile.sh
index 12010f043e49..337e2e779701 100644
--- a/bitnami/mongodb/4.2/debian-10/prebuildfs/libfile.sh
+++ b/bitnami/mongodb/4.2/debian-10/prebuildfs/libfile.sh
@@ -5,18 +5,56 @@
 # Functions
 
 ########################
-# Ensure a line exists in the file by replacing a matching line.
+# Replace a regex in a file
 # Arguments:
 #   $1 - filename
-#   $2 - line
-#   $3 - match
+#   $2 - match regex
+#   $3 - substitute regex
+#   $4 - use POSIX regex. Default: true
 # Returns:
 #   None
 #########################
-file_contains_line() {
+replace_in_file() {
     local filename="${1:?filename is required}"
-    local line="${2:?line is required}"
-    local match="${3:?match is required}"
+    local match_regex="${2:?match regex is required}"
+    local substitute_regex="${3:?substitute regex is required}"
+    local posix_regex=${4:-true}
 
-    sed --in-place "s/^$match\$/$line/" "$filename"
+    local result
+
+    # We should avoid using 'sed in-place' substitutions
+    # 1) They are not compatible with files mounted from ConfigMap(s)
+    # 2) We found incompatibility issues with Debian10 and "in-place" substitutions
+    if [[ $posix_regex = true ]]; then
+        result="$(sed -E "s@$match_regex@$substitute_regex@g" "$filename")"
+    else
+        result="$(sed "s@$match_regex@$substitute_regex@g" "$filename")"
+    fi
+    echo "$result" > "$filename"
+}
+
+########################
+# Remove a line in a file based on a regex
+# Arguments:
+#   $1 - filename
+#   $2 - match regex
+#   $3 - use POSIX regex. Default: true
+# Returns:
+#   None
+#########################
+remove_in_file() {
+    local filename="${1:?filename is required}"
+    local match_regex="${2:?match regex is required}"
+    local posix_regex=${3:-true}
+    local result
+
+    # We should avoid using 'sed in-place' substitutions
+    # 1) They are not compatible with files mounted from ConfigMap(s)
+    # 2) We found incompatibility issues with Debian10 and "in-place" substitutions
+    if [[ $posix_regex = true ]]; then
+        result="$(sed -E "/$match_regex/d" "$filename")"
+    else
+        result="$(sed "/$match_regex/d" "$filename")"
+    fi
+    echo "$result" > "$filename"
 }
diff --git a/bitnami/mongodb/4.2/debian-10/rootfs/libmongodb.sh b/bitnami/mongodb/4.2/debian-10/rootfs/libmongodb.sh
index 480fce46bb7e..ba62a87280c8 100644
--- a/bitnami/mongodb/4.2/debian-10/rootfs/libmongodb.sh
+++ b/bitnami/mongodb/4.2/debian-10/rootfs/libmongodb.sh
@@ -584,7 +584,13 @@ rs.initiate({"_id":"$MONGODB_REPLICA_SET_NAME", "members":[{"_id":0,"host":"$nod
 EOF
 )
 
-    grep -q "\"ok\" : 1\|\"code\" : 23" <<< "$result"
+    # Code 23 is considered OK
+    # It indicates that the node is already initialized
+    if grep -q "\"code\" : 23" <<< "$result"; then
+        warn "Node already initialized."
+        return 0
+    fi
+    grep -q "\"ok\" : 1" <<< "$result"
 }
 
 
@@ -609,10 +615,9 @@ EOF
     # It indicates a possiblely desynced configuration,
     # which will become resynced when the secondary joins the replicaset.
     if grep -q "\"code\" : 103" <<< "$result"; then
-      warn "The ReplicaSet configuration is not aligned with primary node's configuration. Starting secondary node so it syncs with ReplicaSet..."
-      return 0
+        warn "The ReplicaSet configuration is not aligned with primary node's configuration. Starting secondary node so it syncs with ReplicaSet..."
+        return 0
     fi
-
     grep -q "\"ok\" : 1" <<< "$result"
 }
 
diff --git a/bitnami/mongodb/README.md b/bitnami/mongodb/README.md
index e057229dfc8b..0e9a19296a6e 100644
--- a/bitnami/mongodb/README.md
+++ b/bitnami/mongodb/README.md
@@ -49,7 +49,7 @@ Learn more about the Bitnami tagging policy and the difference between rolling t
 
 
 * [`4.2-ol-7`, `4.2.3-ol-7-r8` (4.2/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/4.2.3-ol-7-r8/4.2/ol-7/Dockerfile)
-* [`4.2-debian-10`, `4.2.3-debian-10-r9`, `4.2`, `4.2.3` (4.2/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/4.2.3-debian-10-r9/4.2/debian-10/Dockerfile)
+* [`4.2-debian-10`, `4.2.3-debian-10-r10`, `4.2`, `4.2.3` (4.2/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/4.2.3-debian-10-r10/4.2/debian-10/Dockerfile)
 * [`4.0-ol-7`, `4.0.16-ol-7-r3` (4.0/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/4.0.16-ol-7-r3/4.0/ol-7/Dockerfile)
 * [`3.6-ol-7`, `3.6.17-ol-7-r8` (3.6/ol-7/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/3.6.17-ol-7-r8/3.6/ol-7/Dockerfile)
 * [`3.6-debian-10`, `0.0.0-debian-10-r0`, `3.6`, `0.0.0` (3.6/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-mongodb/blob/0.0.0-debian-10-r0/3.6/debian-10/Dockerfile)