found multiple log prefixes in skaffold.yaml (not supported

Error message

found multiple log prefixes in skaffold.yaml (not supported in `skaffold apply`): %s, %s

What it means

getDefaultDeployer merges log settings across multiple skaffold configs. When configs declare different `deploy.logs.prefix` values, there is no single prefix to use, so this error is returned for `skaffold apply`. It lists both conflicting prefixes.

Source

Thrown at pkg/skaffold/runner/deployer.go:264

			kubeContext = d.KubeContext
		}
		if d.StatusCheck != nil {
			if statusCheck == nil {
				statusCheck = d.StatusCheck
			} else if statusCheck != d.StatusCheck {
				// if we get conflicting values for status check from different skaffold configs, we turn status check off
				statusCheck = util.Ptr(false)
			}
		}
		if d.StatusCheckDeadlineSeconds != 0 && d.StatusCheckDeadlineSeconds != int(status.DefaultStatusCheckDeadline.Seconds()) {
			if statusCheckTimeout != -1 && statusCheckTimeout != d.StatusCheckDeadlineSeconds {
				return nil, fmt.Errorf("found multiple status check timeouts in skaffold.yaml (not supported in `skaffold apply`): %d, %d", statusCheckTimeout, d.StatusCheckDeadlineSeconds)
			}
			statusCheckTimeout = d.StatusCheckDeadlineSeconds
		}
		if d.Logs.Prefix != "" {
			if logPrefix != "" && logPrefix != d.Logs.Prefix {
				return nil, fmt.Errorf("found multiple log prefixes in skaffold.yaml (not supported in `skaffold apply`): %s, %s", logPrefix, d.Logs.Prefix)
			}
			logPrefix = d.Logs.Prefix
		}
		var currentDefaultNamespace *string
		var currentKubectlFlags latest.KubectlFlags
		if d.KubectlDeploy != nil {
			currentDefaultNamespace = d.KubectlDeploy.DefaultNamespace
			currentKubectlFlags = d.KubectlDeploy.Flags
		}
		if kFlags == nil {
			kFlags = &currentKubectlFlags
		}
		if err := validateKubectlFlags(kFlags, currentKubectlFlags); err != nil {
			return nil, err
		}
		if currentDefaultNamespace != nil {
			if defaultNamespace != nil && *defaultNamespace != *currentDefaultNamespace {
				return nil, fmt.Errorf("found multiple namespaces in skaffold.yaml (not supported in `skaffold apply`): %s, %s", *defaultNamespace, *currentDefaultNamespace)

View on GitHub (pinned to a1189de023)

Solutions

Set an identical `deploy.logs.prefix` in all composed configs
Remove `logs.prefix` from all configs except one
Centralize logging config in a shared base skaffold config

Example fix

// config-a (before)
deploy:
  logs:
    prefix: app-
// config-b (before)
deploy:
  logs:
    prefix: svc-
// after
# set prefix: app- in both, or omit in config-b

Defensive patterns

Strategy: validation

Validate before calling

const prefixes = configs.map(c => c.deploy?.logs?.prefix).filter(Boolean)
if (new Set(prefixes).size > 1) {
  throw new Error('conflicting logs.prefix values: ' + prefixes.join(', '))
}

Prevention

Define log prefix once in a shared base config
Omit logs.prefix in per-service configs that get composed together
Validate merged config output before running apply in CI

When it happens

Trigger: Running `skaffold apply` against multiple skaffold configs where `deploy.logs.prefix` is set to different strings in at least two configs.

Common situations: Composing per-service skaffold configs (dependencies/profiles) that each set their own log prefix.

Related errors

AI-assisted analysis of GoogleContainerTools/skaffold@a1189de023 (2026-09-05). Data as JSON: /api/errors/8526f369c49b7265. Report an issue: GitHub.