diff --git a/model/src/main/proto/oppia_logger.proto b/model/src/main/proto/oppia_logger.proto
index 18e7c10e407..a34f404aa07 100644
--- a/model/src/main/proto/oppia_logger.proto
+++ b/model/src/main/proto/oppia_logger.proto
@@ -127,7 +127,7 @@ message EventLog {
       LearnerDetailsContext app_in_foreground_context = 25;
 
       // The event being logged is related to starting an exploration.
-      ExplorationContext start_exploration_context = 54;
+      ExplorationContext start_exploration_context = 56;
 
       // The event being logged is related to exiting an exploration.
       ExplorationContext exit_exploration_context = 26;