Panic when redeploying the pipeline

[yhl25]

{"level":"error","ts":"2024-07-27T15:13:08.068429208Z","logger":"numaflow.Sink-processor","caller":"fetch/processor_manager.go:269","msg":"Unable to find the processor","pipeline":"dummy-ceres-transaction-pipeline","vertex":"out","processorEntity":"dummy-ceres-transaction-pipeline-input-318","stacktrace":"github.com/numaproj/numaflow/pkg/watermark/fetch.(*processorManager).startTimeLineWatcher\n\t/home/runner/work/numaflow/numaflow/pkg/watermark/fetch/processor_manager.go:269"}
{"level":"error","ts":"2024-07-27T15:13:08.068445148Z","logger":"numaflow.Sink-processor","caller":"fetch/processor_manager.go:269","msg":"Unable to find the processor","pipeline":"dummy-ceres-transaction-pipeline","vertex":"out","processorEntity":"dummy-ceres-transaction-pipeline-input-353","stacktrace":"github.com/numaproj/numaflow/pkg/watermark/fetch.(*processorManager).startTimeLineWatcher\n\t/home/runner/work/numaflow/numaflow/pkg/watermark/fetch/processor_manager.go:269"}
panic: runtime error: index out of range [4] with length 1

goroutine 208 [running]:
github.com/numaproj/numaflow/pkg/watermark/fetch.(*processorManager).startTimeLineWatcher(0xc0004cc300)
	/home/runner/work/numaflow/numaflow/pkg/watermark/fetch/processor_manager.go:296 +0xc70
created by github.com/numaproj/numaflow/pkg/watermark/fetch.(*processorManager).init in goroutine 205
	/home/runner/work/numaflow/numaflow/pkg/watermark/fetch/processor_manager.go:95 +0xd6