diff --git a/src/utils/exportSQL/generic.js b/src/utils/exportSQL/generic.js
index 04d220839..37e9d42c2 100644
--- a/src/utils/exportSQL/generic.js
+++ b/src/utils/exportSQL/generic.js
@@ -194,7 +194,7 @@ export function jsonToMySQL(obj) {
                 field.name
               }\` ${getTypeString(field, obj.database)}${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " AUTO_INCREMENT" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, obj.database)}`
                   : ""
@@ -301,7 +301,7 @@ export function jsonToPostgreSQL(obj) {
                 field.name
               }" ${getTypeString(field, obj.database, DB.POSTGRES)}${
                 field.notNull ? " NOT NULL" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== "" ? ` DEFAULT ${parseDefault(field)}` : ""
               }${
                 field.check === "" ||
@@ -397,7 +397,7 @@ export function jsonToSQLite(obj) {
             `${field.comment === "" ? "" : `\t-- ${field.comment}\n`}\t"${
               field.name
             }" ${getSQLiteType(field)}${field.notNull ? " NOT NULL" : ""}${
-              field.unique ? " UNIQUE" : ""
+              field.unique && !field.primary ? " UNIQUE" : ""
             }${field.default !== "" ? ` DEFAULT ${parseDefault(field, obj.database)}` : ""}${
               field.check === "" ||
               !dbToTypes[obj.database][field.type].hasCheck
@@ -437,7 +437,7 @@ export function jsonToMariaDB(obj) {
                 field.name
               }\` ${getTypeString(field, obj.database, DB.MYSQL)}${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " AUTO_INCREMENT" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, obj.database)}`
                   : ""
@@ -514,7 +514,7 @@ export function jsonToSQLServer(obj) {
               }] ${getTypeString(field, obj.database, DB.MSSQL)}${
                 field.notNull ? " NOT NULL" : ""
               }${field.increment ? " IDENTITY" : ""}${
-                field.unique ? " UNIQUE" : ""
+                field.unique && !field.primary ? " UNIQUE" : ""
               }${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, obj.database)}`
@@ -589,7 +589,7 @@ export function jsonToOracleSQL(obj) {
               }" ${getTypeString(field, obj.database, DB.ORACLESQL)}${
                 field.notNull ? " NOT NULL" : ""
               }${field.increment ? " GENERATED ALWAYS AS IDENTITY" : ""}${
-                field.unique ? " UNIQUE" : ""
+                field.unique && !field.primary ? " UNIQUE" : ""
               }${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, obj.database)}`
diff --git a/src/utils/exportSQL/mariadb.js b/src/utils/exportSQL/mariadb.js
index 59255d411..016030428 100644
--- a/src/utils/exportSQL/mariadb.js
+++ b/src/utils/exportSQL/mariadb.js
@@ -29,7 +29,7 @@ export function toMariaDB(diagram) {
             (field) =>
               `\t\`${field.name}\` ${parseType(field)}${field.unsigned ? " UNSIGNED" : ""}${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " AUTO_INCREMENT" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, diagram.database)}`
                   : ""
diff --git a/src/utils/exportSQL/mssql.js b/src/utils/exportSQL/mssql.js
index a2354d358..db1300038 100644
--- a/src/utils/exportSQL/mssql.js
+++ b/src/utils/exportSQL/mssql.js
@@ -42,7 +42,7 @@ export function toMSSQL(diagram) {
           return `\t[${field.name}] ${field.type}${field.size && isSized ? `(${field.size})` : ""}${
             field.notNull ? " NOT NULL" : ""
           }${field.increment ? " IDENTITY" : ""}${
-            field.unique ? " UNIQUE" : ""
+            field.unique && !field.primary ? " UNIQUE" : ""
           }${
             field.default !== ""
               ? ` DEFAULT ${parseDefault(field, diagram.database)}`
diff --git a/src/utils/exportSQL/mysql.js b/src/utils/exportSQL/mysql.js
index f35dbda3f..5f55fce17 100644
--- a/src/utils/exportSQL/mysql.js
+++ b/src/utils/exportSQL/mysql.js
@@ -33,7 +33,7 @@ export function toMySQL(diagram) {
                   : ""
               }${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " AUTO_INCREMENT" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, diagram.database)}`
                   : ""
diff --git a/src/utils/exportSQL/oraclesql.js b/src/utils/exportSQL/oraclesql.js
index 0a44c5650..1bfca3c2e 100644
--- a/src/utils/exportSQL/oraclesql.js
+++ b/src/utils/exportSQL/oraclesql.js
@@ -18,7 +18,7 @@ export function toOracleSQL(diagram) {
                   : ""
               }${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " GENERATED ALWAYS AS IDENTITY" : ""
-              }${field.unique ? " UNIQUE" : ""}${
+              }${field.unique && !field.primary ? " UNIQUE" : ""}${
                 field.default !== ""
                   ? ` DEFAULT ${parseDefault(field, diagram.database)}`
                   : ""
diff --git a/src/utils/exportSQL/postgres.js b/src/utils/exportSQL/postgres.js
index 3dc6c0e13..c4a459a3d 100644
--- a/src/utils/exportSQL/postgres.js
+++ b/src/utils/exportSQL/postgres.js
@@ -39,7 +39,7 @@ export function toPostgres(diagram) {
             }" ${field.type}${
               field.size ? `(${field.size})` : ""
             }${field.isArray ? " ARRAY" : ""}${field.notNull ? " NOT NULL" : ""}${
-              field.unique ? " UNIQUE" : ""
+              field.unique && !field.primary ? " UNIQUE" : ""
             }${field.increment ? " GENERATED BY DEFAULT AS IDENTITY" : ""}${
               field.default?.trim()
                 ? ` DEFAULT ${parseDefault(field, diagram.database)}`
diff --git a/src/utils/exportSQL/sqlite.js b/src/utils/exportSQL/sqlite.js
index 25ae186c7..e1cf3ab65 100644
--- a/src/utils/exportSQL/sqlite.js
+++ b/src/utils/exportSQL/sqlite.js
@@ -14,7 +14,7 @@ export function toSqlite(diagram) {
             `${exportFieldComment(field.comment)}\t"${
               field.name
             }" ${field.type}${field.notNull ? " NOT NULL" : ""}${
-              field.unique ? " UNIQUE" : ""
+              field.unique && !field.primary ? " UNIQUE" : ""
             }${field.default !== "" ? ` DEFAULT ${parseDefault(field, diagram.database)}` : ""}${
               field.check === "" ||
               !dbToTypes[diagram.database][field.type].hasCheck