diff --git a/src/main/kotlin/com/openlattice/mechanic/upgrades/V3StudyMigrationUpgrade.kt b/src/main/kotlin/com/openlattice/mechanic/upgrades/V3StudyMigrationUpgrade.kt
index e8a014c0..7192cc0c 100644
--- a/src/main/kotlin/com/openlattice/mechanic/upgrades/V3StudyMigrationUpgrade.kt
+++ b/src/main/kotlin/com/openlattice/mechanic/upgrades/V3StudyMigrationUpgrade.kt
@@ -147,18 +147,19 @@ class V3StudyMigrationUpgrade(
                             EnumSet.of(MetadataOption.LAST_WRITE),
                             Optional.empty(),
                             false
-                    ).forEach { (v2Id, fqnToValue) ->
-                        logger.info("Processing study with entity_key_id $v2Id")
+                    ).forEach { (studyEkid, fqnToValue) ->
+                        logger.info("Processing study with entity_key_id $studyEkid")
 
                         // process study entities into a Study table
                         logger.info("Inserting study $fqnToValue into studies")
-                        if (insertIntoStudiesTable(connection, orgId, v2Id, fqnToValue)) {
+                        if (insertIntoStudiesTable(connection, orgId, studyEkid, fqnToValue)) {
                             // process participants of studies
-                            logger.info("Processing all participants of $v2Id")
+                            logger.info("Processing all participants of $studyEkid")
                             try {
-                                processParticipantsOfStudy(connection, v2Id, orgStudyEntitySetIds, orgMaybeParticipantEntitySetIds)
+                                val studyStringId = fqnToValue[FullQualifiedName("general.stringid")]!!.first() as String
+                                processParticipantsOfStudy(connection, studyEkid, studyStringId, orgStudyEntitySetIds, orgMaybeParticipantEntitySetIds)
                             } catch (ex: Exception) {
-                                logger.error("An error occurred processing participants of $v2Id", ex)
+                                logger.error("An error occurred processing participants of $studyEkid", ex)
                             }
                         }
                     }
@@ -184,6 +185,7 @@ class V3StudyMigrationUpgrade(
                         entitySets.keySet(
                             Predicates.equal<UUID, EntitySet>("name", "chronicle_participants_${legacyStudyFqnToValue.getOrDefault(FullQualifiedName("general.stringid"), null)}")
                         ).forEach { participantESID ->
+                            val legacyStudyStringId = legacyStudyFqnToValue[FullQualifiedName("general.stringid")]!!.first() as String
                             dataQueryService.getEntitiesWithPropertyTypeFqns(
                                 mapOf(participantESID to Optional.of(setOf<UUID>())),
                                 mapOf(participantESID to legacyParticipantPropertyTypes),
@@ -193,7 +195,7 @@ class V3StudyMigrationUpgrade(
                                 false
                             ).forEach { (_, legacyParticipantFqnToValue) ->
                                 logger.info("Inserting participant: $legacyParticipantFqnToValue into candidates")
-                                insertIntoCandidatesTable(connection, legacyStudyEkid, legacyParticipantFqnToValue)
+                                insertIntoCandidatesTable(connection, legacyStudyStringId, legacyParticipantFqnToValue)
                             }
                         }
                     } catch (ex: Exception) {
@@ -206,7 +208,7 @@ class V3StudyMigrationUpgrade(
         return true
     }
 
-    private fun insertIntoStudiesTable(conn: Connection, orgId: UUID, studyId: UUID, fqnToValue: Map<FullQualifiedName, MutableSet<Any>>): Boolean {
+    private fun insertIntoStudiesTable(conn: Connection, orgId: UUID, studyEkid: UUID, fqnToValue: Map<FullQualifiedName, MutableSet<Any>>): Boolean {
         val columns = fqnToStudiesColumnName.filter { fqnToValue.containsKey(it.key) }
         if (columns.isEmpty()) {
             logger.info("No useful property to record for study ${fqnToValue}, skipping")
@@ -222,7 +224,7 @@ class V3StudyMigrationUpgrade(
             try {
                 var index = 1
 
-                ps.setObject(index++, studyId)
+                ps.setObject(index++, studyEkid)
                 ps.setObject(index++, orgId)
                 columns.keys.forEach {
                     when (it.namespace) {
@@ -246,7 +248,7 @@ class V3StudyMigrationUpgrade(
         return true
     }
 
-    private fun processParticipantsOfStudy(conn: Connection, studyEkid: UUID, orgStudyEntitySetIds: Set<UUID>, orgMaybeParticipantEntitySetIds: Set<UUID>) {
+    private fun processParticipantsOfStudy(conn: Connection, studyEkid: UUID, studyStringId: String, orgStudyEntitySetIds: Set<UUID>, orgMaybeParticipantEntitySetIds: Set<UUID>) {
 
         val filter = EntityNeighborsFilter(setOf(studyEkid), Optional.of(orgMaybeParticipantEntitySetIds), Optional.of(orgStudyEntitySetIds), Optional.empty())
 
@@ -273,12 +275,12 @@ class V3StudyMigrationUpgrade(
                     val neighborFqnToValue = neighbor.neighborDetails.get() + neighbor.associationDetails.filterKeys { it == FullQualifiedName("ol.status") }
 
                     logger.info("Inserting participant: $neighborFqnToValue into candidates")
-                    insertIntoCandidatesTable(conn, studyEkid, neighborFqnToValue)
+                    insertIntoCandidatesTable(conn, studyStringId, neighborFqnToValue)
                 }
         }
     }
 
-    private fun insertIntoCandidatesTable(conn: Connection, studyId: UUID, fqnToValue: Map<FullQualifiedName, Set<Any>>) {
+    private fun insertIntoCandidatesTable(conn: Connection, studyStringId: String, fqnToValue: Map<FullQualifiedName, Set<Any>>) {
         val columns = fqnToCandidatesColumnName.filter { fqnToValue.containsKey(it.key) }
         if (columns.isEmpty()) {
             logger.info("No useful property to record for participant ${fqnToValue}, skipping")
@@ -286,7 +288,7 @@ class V3StudyMigrationUpgrade(
         }
 
         val INSERT_INTO_CANDIDATE_SQL = """
-            INSERT INTO candidates (v2_study_ekid, ${columns.values.joinToString()}) VALUES (?${",?".repeat(columns.size)})
+            INSERT INTO candidates (v2_study_id, ${columns.values.joinToString()}) VALUES (?${",?".repeat(columns.size)})
         """.trimIndent()
         logger.debug(INSERT_INTO_CANDIDATE_SQL)
 
@@ -294,7 +296,7 @@ class V3StudyMigrationUpgrade(
             try {
                 var index = 1
 
-                ps.setObject(index++, studyId)
+                ps.setString(index++, studyStringId)
                 columns.keys.forEach {
                     when (it.name) {
                         "PersonBirthDate" -> ps.setObject(index++, fqnToValue[it]!!.first() as LocalDate)